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Test Bank for Conceptual Physics, 12th Edition

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    1 Conceptual Physics, 12e (Hewitt) Chapter 1 About Science 1.1 Multiple-Choice Questions 1) Science is a body of knowledge that A) describes order in nature. B) is an ongoing human activity. C) condenses knowledge into testable laws. D) all of the above E) none of the above Answer: D Diff: 1 Topic: Scientific Measurements 2) To a fair approximation, Early Greeks knew the A) size of Earth. B) size of the Moon. C) Earth-Moon distance. D) all of the above Answer: D Diff: 1 Topic: Scientific Measurements 3) When the Sun shines on the Moon, the Moon casts a shadow A) at all times. B) that is tapered. C) that sometimes falls on Earth. D) all of the above Answer: D Diff: 1 Topic: Scientific Measurements 4) Eratosthenes first learned about the position of the Sun in mid-summer by A) consulting library information. B) setting up a stick at Syene. C) setting up a stick at Alexandria. D) setting up sticks at both Syene and Alexandria. E) none of the above Answer: A Diff: 2 Topic: Scientific Measurements

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    2 5) Eratosthenes' measurements of Earth's size involved A) a deep well in Syene. B) a pillar's shadow in Alexandria. C) surveying the distance between Alexandria and Syene. D) all of the above Answer: D Diff: 2 Topic: Scientific Measurements 6) When we see a half Moon in the sky, the lines between Earth, Moon, and Sun A) are equal in length. B) are parallel to one another. C) form a right triangle. D) all of the above Answer: C Diff: 2 Topic: Scientific Measurements 7) Spots of sunlight on the ground cast through openings between leaves in trees above are actually A) images of the Sun. B) part of a solar eclipse. C) due to refraction of sunlight. D) all of the above Answer: A Diff: 1 Topic: Scientific Measurements 8) A simple method of measuring the distance between the Earth and the Moon is to place in your line of sight to the Moon a A) magnifying glass. B) coin. C) telescope. D) meterstick. Answer: B Diff: 2 Topic: Scientific Measurements 9) The safest way to view an image of the Sun is to use A) a telescope. B) binoculars. C) a pinhole. D) colored sunglasses. Answer: C Diff: 2 Topic: Scientific Measurements

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    3 10) The scientific method is most effective in A) making hypotheses. B) gaining, organizing, and applying new knowledge. C) discovering new things. D) making theories. E) performing experiments. Answer: B Diff: 1 Topic: Scientific Methods 11) An educated scientific guess is a A) hypothesis. B) theory. C) either of these D) neither of these Answer: A Diff: 1 Topic: Scientific Methods 12) Facts in the field of science A) are absolute. B) are changeable. C) mean very little. D) are more important than theories. Answer: B Diff: 1 Topic: Scientific Methods 13) The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific A) fact. B) hypothesis. C) law or principle. D) theory. E) none of the above Answer: D Diff: 1 Topic: Scientific Methods 14) A theory in the field of science is A) an educated guess. B) less than a fact. C) a synthesis of a large body of well-tested knowledge. D) unchangeable. Answer: C Diff: 1 Topic: Scientific Methods

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    4 15) When a dishonest scientist reports false information, he or she A) as in many other professions, will be excused by the scientific community. B) gets no second chance in the scientific community. C) is elevated in the scientific community. Answer: B Diff: 1 Topic: Scientific Methods 16) Which of the following is a scientific statement? A) candy Bon Bons contain no sugar B) there are things we will never know about C) matter is filled with undetectable particles D) there are parts of the universe that will never be discovered by humans E) none of the above Answer: A Diff: 1 Topic: Scientific Methods 17) For a scientific hypothesis to be valid, there must be a test for proving it A) right. B) wrong. C) conclusively one way or the other. Answer: B Diff: 1 Topic: Scientific Methods 18) The statement, "There are regions beneath Earth's crust that will always be beyond the reach of scientific investigation" is A) a fact. B) speculation. C) a hypothesis. D) a scientific statement. E) a theory. Answer: B Diff: 1 Topic: Scientific Methods 19) Pseudoscience is best characterized as being A) new age. B) an alternate view to be taken seriously. C) fake. D) all of the above Answer: C Diff: 1 Topic: Scientific Methods

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    5 20) Science, art, and religion normally need not contradict one another because A) all three involve different domains. B) choosing the right one means no need to heed the other two. C) choosing religion and art means no need to heed science. D) choosing science means no need to heed religion and art. Answer: A Diff: 1 Topic: Science, Art, and Religion 21) A truly educated person is knowledgeable about A) science. B) the arts. C) religion. D) all of the above Answer: D Diff: 1 Topic: Science, Art, and Religion 22) Science and technology are A) responsible for all the good in the world. B) responsible for all the bad in the world. C) actually one and the same. D) fundamentally different from each other. Answer: D Diff: 1 Topic: Science and Technology 23) Technology is a tool that can A) be socially beneficial. B) be socially harmful when abused. C) lead to a better world. D) all of the above Answer: D Diff: 1 Topic: Science and Technology 24) The most basic of the sciences of physics, chemistry, and biology is A) physics. B) chemistry. C) biology. D) none of the above Answer: A Diff: 1 Topic: Physics-the Basic Science

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    6 25) Which of the following involves passion, talent, and intelligence? A) art B) literature C) music D) science E) all of the above Answer: E Diff: 1 Topic: Physics-the Basic Science

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    1 Conceptual Physics, 12e (Hewitt) Chapter 2 Newton's First Law of Motion: Inertia 2.1 Multiple - Choice Questions 1) The earliest and most influential Greek philosopher was Aristotle, who among many contributions taught that A) the four elements are eart h, water, air, and fire. B) all motion is either natural or violent. C) violent motion requires a sustained push or pull. D) all of the above Answer: D Diff: 1 Topic: Aristotle on Motion 2) Science later greatly advanced when Galileo favored A) philosop hical discussions over experiment. B) experiment over philosophical discussions. C) nonmathematical thinking. D) none of the above Answer: B Diff: 1 Topic: Aristotle on Motion 3) The first scientist to be credited for postulating that Earth circled the Sun was A) Aristotle. B) Copernicus. C) Galileo. D) Newton. Answer: B Diff: 1 Topic: Aristotle on Motion 4) The first scientist to introduce the concept of inertia was A) Aristotle. B) Galileo. C) Newton. D) Copernicus. Answer: B Diff: 1 Topic: Galil eo's Experiments

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    2 5) Inertia is defined as a A) force. B) property of matter. C) change in motion. D) none of the above Answer: B Diff: 1 Topic: Galileo's Experiments 6) Galileo's use of inclined planes allowed him to effectively A) slow down the ball's changes in speed. B) reduce the time of the ball's changes in speed. C) eliminate all changes in speed. D) eliminate friction. Answer: A Diff: 1 Topic: Galileo's Experiments 7) Galileo's interpretation of motion differed from Aristotle's in that Galile o emphasized A) the acceleration of free fall. B) rates of time. C) the role of distance in describing motion. D) none of the above Answer: B Diff: 2 Topic: Galileo's Experiments 8) If no external forces act on a moving object, it will A) continue movin g at the same speed. B) move slower and slower until it finally stops. C) come to an abrupt halt. D) none of the above Answer: A Diff: 1 Topic: Galileo's Experiments 9) Galileo taught us that if you roll a ball along a level surface it will A) soon slow down due to its natural place. B) keep rolling if friction is absent. C) roll as long as its inertia nudges it along. D) soon roll in the opposite direction. Answer: B Diff: 1 Topic: Galileo's Experiments

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    3 10) A hockey puck sliding across the ice final ly comes to rest because A) it seeks its proper and natural state. B) of friction. C) that's just the way it is. Answer: B Diff: 1 Topic: Galileo's Experiments 11) A hockey puck is set in motion across a frozen pond. If ice friction and air resistance ar e neglected, the force required to keep the puck sliding at constant velocity is A) equal to its weight. B) equal to its weight divided by its mass. C) equal to its mass times its weight. D) none of the above Answer: D Diff: 1 Topic: Newton's First Law 12) The amount of force needed to sustain motion of a rock in outer space is A) a force equal to its weight. B) a force less than its weight if friction is absent. C) none of these Answer: C Diff: 1 Topic: Newton's First Law 13) When no forces act on mo ving objects their paths are normally A) straight lines. B) circles. C) ellipses. D) all of the above Answer: A Diff: 1 Topic: Newton's First Law 14) If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in A) a curved pat h. B) an outward spiral path. C) an inward spiral path. D) a straight - line path. Answer: D Diff: 1 Topic: Newton's First Law

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    4 15) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) follow a circular path. B) slow down. C) follow a straight - line path. D) stop. Answer: C Diff: 1 Topic: Newton's First Law 16) Which concept is being illustrated when a tablecloth is quickly yanked beneath dishes resting on a table? A) equilibrium B) fr iction C) support force D) inertia Answer: D Diff: 1 Topic: Newton's First Law 17) When you flick a card from beneath a coin that hardly moves, you're illustrating A) inertia. B) equilibrium. C) support force. D) friction. Answer: A Diff: 1 Topic: New ton's First Law 18) A sheet of paper can be quickly jerked beneath a container of milk without toppling, which best demonstrates A) net force. B) the difference between force and mass. C) inertia. Answer: C Diff: 1 Topic: Newton's First Law 19) A roll er - coaster ride with 6 passengers takes 3 minutes. Neglecting friction, a similar ride with 12 passengers aboard would take A) 1.5 minutes. B) 3 minutes. C) 6 minutes. D) 18 minutes. Answer: B Diff: 3 Topic: Newton's First Law

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    5 20) A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is A) zero. B) less than 30 m/s but more than zero. C) about 30 m/s. D) more than 30 m/s. Answer: C Diff: 2 Topic: Newton's Firs t Law 21) If your automobile runs out of fuel while driving, the engine stops. You don't come to an abrupt stop due to A) inertia. B) gravity. C) resistance. D) the principle of continuation. Answer: A Diff: 2 Topic: Newton's First Law 22) When a rocket ship gaining speed in outer space runs out of fuel, it A) gains speed for a short time, then slows down to a constant velocity. B) gains speed for a short time, slows down, and eventually stops. C) no longer gains speed. Answer: C Diff: 2 Topic: Newton' s First Law 23) A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity. When the glue gives way, the stone falls and hits the floor A) ahead of the midpoint of the ceiling. B) exactly below the midpoint of the ceiling. C) behind the midpoint of the ceiling. D) none of the above Answer: B Diff: 2 Topic: Newton's First Law 24) While you are standing in the aisle of a bus, the driver suddenly makes a left turn. You lurch to the right due to A) an unbalan ced force. B) your tendency to keep moving forward. C) an equilibrium challenge. Answer: B Diff: 2 Topic: Newton's First Law

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    6 25) Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its engine is turned off. This i s not observed because railroad trains A) aren't massive enough. B) are too heavy. C) ride on straight tracks. D) encounter opposing forces. Answer: D Diff: 2 Topic: Newton's First Law 26) Tension is actually a force that tends to A) stretch something. B ) compress something. C) break something. D) balance something. Answer: A Diff: 1 Topic: Newton's First Law 27) Nellie pulls with a force of 50 N on a horizontal rope tied to a tree at rest. The net force on the rope is A) 50 N and rope tension is 0 N. B) 50 N and rope tension is also 50 N. C) zero and rope tension is 50 N. D) zero and rope tension is also zero. Answer: C Diff: 2 Topic: Newton's First Law 28) Two students engaged in a tug - of - war each pull a rope in opposite directions with a force of 400 N. The net force on the rope is A) zero and rope tension is 400 N. B) zero and rope tension is 800 N. C) 400 N and rope tension is 800 N. D) 400 N and rope tension is also 400 N. Answer: A Diff: 2 Topic: Newton's First Law

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    7 29) When you quickly jerk a cart forward that has a ball resting in the middle, the A) front of the cart hits the ball. B) back of the cart hits the ball. C) neither, for the ball rides along in the middle as the cart moves forward. D) All of the above depending on how quickly the cart is pulled. Answer: B Diff: 2 Topic: Newton's First Law 30) A force is a vector quantity because it has both A) magnitude and direction. B) mass and velocity. C) action and reaction counterparts. D) speed and direction. Answer: A Diff: 1 Topic: N et Force and Vectors 31) Which of the following is a vector quantity? A) area B) volume C) mass D) none of the above Answer: D Diff: 2 Topic: Net Force and Vectors 32) A block pulled to the left with 15 N and to the right with 5 N at the same time exper iences a net force of A) 5 N. B) 10 N. C) 15 N. D) 20 N. Answer: B Diff: 2 Topic: Net Force and Vectors 33) A tree stump is pulled northward by a 10 - N force at the same time a 25 - N force pulls it southward. The resultant force has a magnitude of A) 0 N . B) 15 N. C) 25 N. D) 150 N. Answer: B Diff: 2 Topic: Net Force and Vectors

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    8 34) When a pair of 10 - N forces act on a box of candy, the net force on the box is A) zero. B) about 14 N. C) 20 N. D) Any of the above depending on the directions of forces. An swer: D Diff: 2 Topic: Net Force and Vectors 35) A pair of 10 - N vectors at right angles to each other has a resultant of about A) 10 N. B) 14 N. C) 20 N. D) none of the above Answer: B Diff: 2 Topic: Net Force and Vectors 36) The resultant of a 40 - N f orce at right angles to a 30 - N force is A) 30 N. B) 40 N. C) 50 N. D) greater than 50 N. Answer: C Diff: 2 Topic: Net Force and Vectors 37) When Nellie Newton hangs by the ends of a rope draped over a large pulley, the tension in each supporting vertica l strand is A) half her weight. B) equal to her weight. C) twice her weight. D) none of the above Answer: A Diff: 2 Topic: Net Force and Vectors 38) If Nellie hangs from a horizontal bar that is supported by four vertical ropes, the tension in the ropes A) are each half her weight. B) are each equal to her weight. C) add to equal her weight. D) none of the above Answer: C Diff: 2 Topic: Net Force and Vectors

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    9 39) A parallelogram is a four - sided figure with opposite sides that are A) equal. B) parallel . C) at right angles. D) none of the above Answer: B Diff: 2 Topic: Net Force and Vectors 40) A pair of wires support a heavy painting. Tension in the wires is greater when they are A) vertical. B) not vertical. C) the same regardless of the wire orient ation. D) none of the above Answer: B Diff: 3 Topic: Net Force and Vectors 41) Suspend your body from a pair of vertical ropes and the tension in each rope will be A) half your weight. B) equal to your weight. C) greater than your weight. D) none of the above Answer: A Diff: 2 Topic: Net Force and Vectors 42) Suspend your body from a pair of ropes slightly angled from the vertical and the tension in each rope will be A) equal your weight. B) half your weight. C) greater than half your weight. D) none o f these Answer: C Diff: 3 Topic: Net Force and Vectors 43) When Nellie Newton hangs at rest in the middle of a clothesline, tensions will be the same in each side of the rope when A) the lengths of each rope are the same. B) the angles for both sides of the rope are equal. C) she is in equilibrium. Answer: B Diff: 2 Topic: Net Force and Vectors

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    10 44) When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when A) the lengths of rope on each side are different. B) the angles at each side of the rope are unequal. C) she is in equilibrium. D) none of the above Answer: B Diff: 2 Topic: Net Force and Vectors 45) Monkey Mo hangs from the middle of a horizontal rope. Tension in the rope is g reatest if the rope A) sags a lot. B) sags very little. C) sags or doesn't sag, for tension is the same in any case. D) none of the above Answer: B Diff: 2 Topic: Net Force and Vectors 46) Nellie hangs from a pair of ropes at an angle. Tension in the rop es depends on the A) length of the ropes. B) angle of the ropes. C) both of these D) neither of these Answer: B Diff: 2 Topic: Net Force and Vectors 47) The net force on any object in equilibrium is A) zero. B) equal to its weight. C) less than its weig ht. D) non - zero when motion is involved. Answer: A Diff: 1 Topic: Equilibrium Rule 48) The equilibrium rule, Σ F = 0, applies to A) objects or systems at rest. B) objects or systems in uniform motion in a straight line. C) both of these D) neither of these Answer: C Diff: 2 Topic: Equilibrium Rule

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    11 49) The equilibrium rule applies to A) vector quantities. B) quantities that are equal in magnitude. C) scalar quantities. D) any kind of quantities. Answer: A Diff: 2 Topic: Equilibrium Rule 50) An object in mechanical equilibrium is an object A) moving with constant velocity. B) having no changes in velocity. C) at rest. D) all of the above Answer: D Diff: 2 Topic: Equilibrium Rule 51) When Burl and Paul stand on opposite ends of a sign - painting scaffold, the tensions in the supporting ropes A) are equal. B) depend on the relative weight s of Burl and Paul. C) combine to equal zero. D) are in equilibrium. Answer: B Diff: 2 Topic: Equilibrium Rule 52) If Burl carries Paul piggy - back while standing in the middle of a scaffold, the tensions in the two supporting ropes would A) cancel to z ero. B) be equal. C) be in dynamic equilibrium. D) more easily support Burl and Paul. Answer: B Diff: 2 Topic: Equilibrium Rule 53) Burl and Paul paint signs together on a scaffold. Compared to their weights plus the weight of the scaffold, the sum of t ensions in the supporting ropes is A) less. B) the same. C) greater. D) zero. Answer: B Diff: 1 Topic: Equilibrium Rule

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    12 54) Burl and Paul have a total weight of 1300 N. The tensions in the supporting ropes that support their scaffold add to 1700 N. The weight of the scaffold itself must be A) 300 N. B) 400 N. C) 500 N. D) 600 N. Answer: B Diff: 2 Topic: Equilibrium Rule 55) A hockey puck sliding at constant velocity across the ice is A) in equilibrium. B) nearly in equilibrium. C) is nowhere near bei ng in equilibrium. D) none of the above Answer: A Diff: 1 Topic: Equilibrium Rule 56) The net force acting on an insect falling downward at constant velocity is A) zero. B) the weight of the insect. C) upward air resistance. D) none of the above Answer: A Diff: 1 Topic: Equilibrium Rule 57) The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is A) more than 10 N. B) less than 10 N. C) 10 N. Answer: C Diff: 1 Topic: Equilibrium Rule 58) The mini mum number of forces that act on a book resting on a table is A) 1. B) 2. C) 3. D) 4. E) none of the above Answer: B Diff: 1 Topic: Support Force

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    13 59) The support force on a 10 - N book at rest on a table is A) slightly less than 10 N. B) 10 N. C) slightly greater than 10 N. D) dependent on the position of the book. Answer: B Diff: 1 Topic: Support Force 60) Jason weighs 150 N and sits on his big brother's shoulders. Big brother weighs 400 N. The support force supplied by the floor must be A) 150 N. B) 400 N. C) 550 N. D) more than 550 N. Answer: C Diff: 2 Topic: Support Force 61) The support force on a 30 - kg dog sleeping on the floor is A) less than 300 N. B) about 300 N. C) more than 300 N. D) nonexistent while asleep. Answer: B Diff: 2 Topic: Sup port Force 62) When you stand at rest on a pair of bathroom scales, the reading on each scale A) is half your weight. B) equals your weight. C) add up to equal your weight. Answer: C Diff: 2 Topic: Support Force 63) Weigh yourself on a weighing scale and the scale shows your normal weight. If you carefully stand on tiptoes, the scale reading will be A) slightly more. B) slightly less. C) about half as much. D) no different. Answer: D Diff: 2 Topic: Support Force

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    14 64) An 800 - N man stands at rest on tw o bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is A) 200 N. B) 400 N. C) 800 N. D) 1600 N. E) none of the above Answer: B Diff: 2 Topic: Support Force 65) The force that causes Earth to orbit the S un is due to gravity, while the force needed to keep Earth moving as it circles the Sun is A) inertia. B) due to gravity. C) due to both inertia and gravity. D) no force at all. Answer: D Diff: 2 Topic: The Moving Earth 66) If you toss a coin straight up ward while in a train moving at constant velocity, the coin will land A) as if you were at rest. B) in front of you. C) in back of you. Answer: A Diff: 2 Topic: The Moving Earth 67) If you toss a coin straight upward in train that gains speed while the coin is in the air, the coin will land A) as if you were at rest. B) in front of you. C) in back of you. Answer: C Diff: 2 Topic: The Moving Earth 68) If you toss a coin straight upward in train that slows while the coin is in the air, the coin will lan d A) as if you were at rest. B) in front of you. C) in back of you. Answer: B Diff: 2 Topic: The Moving Earth

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    15 69) A gymnast performing somersaults in a high - flying plane moving at constant velocity needs to make A) small adjustments to compensate for th e airplane's velocity. B) major adjustments to compensate for the airplane's velocity. C) no adjustments. D) none of the above Answer: C Diff: 2 Topic: The Moving Earth 70) Earth continually moves about 30 km/s through space, which means the wall you st and next to also is moving at 30 km/s. When you jump vertically the wall doesn't slam into you because A) the speeds of you and Earth cancel out. B) you're moving horizontally just as fast as the wall. C) your upward motion is small compared with Earth's s peed. D) motion of the Sun counteracts your motion. Answer: B Diff: 2 Topic: The Moving Earth 71) A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm woul d be 30 km downrange from the bird when it reached the ground. This faulty reasoning is best countered with Newton's A) law of inertia. B) law of gravity. C) laws of motion. D) none of the above Answer: A Diff: 2 Topic: The Moving Earth

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    1 Conceptual Physics, 12e (Hewitt) Chapter 3 Linear Motion 3.1 Multiple-Choice Questions 1) A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the same direction has a speed of A) 0 m/s. B) 3 m/s. C) 4 m/s. D) 6 m/s. Answer: D Diff: 1 Topic: Motion is Relative 2) A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the opposite direction has a speed of A) 0 m/s. B) 3 m/s. C) 4 m/s. D) 6 m/s. Answer: A Diff: 1 Topic: Motion is Relative 3) Katelyn runs along the aisle of a train that moves at 8 m/s. Her speed relative to the floor is 3 m/s. Her speed relative to an observer at rest on the ground is A) 5 m/s. B) 11 m/s. C) either depending on her running direction D) none of the above Answer: C Diff: 2 Topic: Motion is Relative 4) You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A mild 2- m/s breeze is blowing. If the mosquito joins you for lunch it should hover over you by flying A) against the breeze at 2 m/s. B) with the breeze at 2 m/s. C) a bit faster than wind speed. D) none of the above Answer: A Diff: 2 Topic: Motion is Relative

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    2 5) Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same direction. Jake's speed relative to the ground is A) 6 m/s. B) 10 m/s. C) 14 m/s. D) none of the above Answer: C Diff: 2 Topic: Motion is Relative 6) Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the opposite direction. Jake's speed relative to the ground is A) 6 m/s. B) 10 m/s. C) 14 m/s. D) none of the above Answer: A Diff: 2 Topic: Motion is Relative 7) The speedometer of an automobile reads A) average speed. B) instantaneous speed. C) accelerated speed. Answer: B Diff: 1 Topic: Speed and Velocity 8) The two measurements necessary for calculating average speed are A) acceleration and time. B) velocity and time. C) distance and time. D) distance and acceleration. E) velocity and distance. Answer: C Diff: 1 Topic: Speed and Velocity 9) When you walk at an average speed of 4 m/s, in 5 s you'll cover a distance of A) 2 m. B) 10 m. C) 15 m. D) 20 m. Answer: D Diff: 2 Topic: Speed and Velocity

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    3 10) A vehicle undergoes acceleration when it A) gains speed. B) loses speed. C) changes its direction. D) all of the above Answer: D Diff: 1 Topic: Speed and Velocity 11) The average speed of a horse that gallops 10 kilometers in 30 minutes is A) 15 km/h. B) 20 km/h. C) 30 km/h. D) 40 km/h. Answer: B Diff: 2 Topic: Speed and Velocity 12) A ball rolls along a horizontal track in a certain time. If the track has a dip in it, the time to roll the length of the track will be A) less. B) the same. C) more. Answer: A Diff: 3 Topic: Speed and Velocity 13) A ball rolls along a horizontal track in a certain time. If the track has a small upward dent in it, the time to roll the length of the track will be A) less. B) the same. C) more. Answer: C Diff: 3 Topic: Speed and Velocity 14) While a car travels around a circular track at a constant speed, its A) acceleration is zero. B) velocity is zero. C) inertia is zero. D) none of the above Answer: D Diff: 2 Topic: Acceleration

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    4 15) If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is A) 3 m/s2. B) 6 m/s2. C) 60 m/s2. D) 600 m/s2. Answer: B Diff: 2 Topic: Acceleration 16) An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration is A) 0 m/s2. B) 5 m/s2. C) 8 m/s2. D) 24 m/s2. Answer: A Diff: 2 Topic: Acceleration 17) A cart maintains a constant velocity of 100 m/s for 10 seconds. During this interval its acceleration is A) zero. B) 1 m/s2. C) 10 m/s2. D) none of the above Answer: A Diff: 2 Topic: Acceleration 18) A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its acceleration is A) zero. B) 1 m/s2. C) 10 m/s2. D) none of the above Answer: B Diff: 2 Topic: Acceleration

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    5 19) If an object moves with constant acceleration, its velocity must A) be constant also. B) change by the same amount each second. C) change by varying amounts depending on its speed. D) always decrease. Answer: B Diff: 2 Topic: Acceleration 20) A rock dropped from a 5-m height accelerates at 10 m/s2 and strikes the ground 1 s later. If the rock is dropped from a height of 2.5 m, its acceleration of fall is A) half. B) the same. C) twice. D) four times as much. Answer: B Diff: 2 Topic: Acceleration 21) A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always A) in the direction of motion. B) opposite its velocity. C) directed upward. D) directed downward. E) none of the above Answer: D Diff: 2 Topic: Acceleration 22) A car's speed 3 seconds after accelerating from rest at 2 m/s2 is A) 2 m/s. B) 3 m/s. C) 4 m/s. D) 6 m/s. Answer: D Diff: 2 Topic: Acceleration

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    6 23) A ball starting from rest at the top of an inclined plane gains a speed of 2 m/s for each second it rolls. What is its acceleration down the incline? A) 0.5 m/s2 B) 1 m/s2 C) 2 m/s2 D) 4 m/s2 Answer: C Diff: 2 Topic: Acceleration 24) A ball starting from rest at the top of an inclined plane accelerates at 2 m/s2 and reaches the bottom of the plane in 3 seconds. What is the length of the plane? A) 2 m B) 3 m C) 5 m D) 9 m Answer: D Diff: 3 Topic: Acceleration 25) The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is A) 2 s. B) 15 s. C) 30 s. D) 60 s. E) none of the above Answer: B Diff: 3 Topic: Acceleration 26) What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s? A) 1 m/s2 B) 2 m/s2 C) 3 m/s2 D) 4 m/s2 E) 5 m/s2 Answer: D Diff: 3 Topic: Acceleration

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    7 27) Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration? A) 0.25 m/s2 B) 2.8 m/s2 C) 4.0 m/s2 D) 10 m/s2 E) 40 m/s2 Answer: C Diff: 3 Topic: Acceleration 28) If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be A) 50 m/s. B) 500 m/s. C) 3000 m/s. D) 3600 m/s. Answer: C Diff: 3 Topic: Acceleration 29) The accelerations possible for a ball on an inclined plane A) range from zero to g . B) range from g to infinity. C) have no limit. Answer: A Diff: 3 Topic: Acceleration 30) A freely-falling watermelon falls with constant A) velocity. B) speed. C) acceleration. D) distances each successive second. Answer: C Diff: 1 Topic: Free Fall 31) While an iron block near the Earth's surface is in free fall, it undergoes an increase in A) speed. B) acceleration. C) both of these D) neither of these Answer: A Diff: 1 Topic: Free Fall

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    8 32) The distance a freely falling bowling ball falls each second A) is about 5 m. B) is about 10 m. C) increases. D) none of the above Answer: C Diff: 2 Topic: Free Fall 33) Twelve seconds after starting from rest, a freely-falling cantelope has a speed of A) 10 m/s. B) 50 m/s. C) 100 m/s. D) more than 100 m/s. Answer: D Diff: 2 Topic: Free Fall 34) An apple falls from a tree and hits the ground 5 meters below with a speed of about A) 5 m/s. B) 10 m/s. C) 15 m/s. D) 20 m/s. E) not enough information Answer: B Diff: 2 Topic: Free Fall 35) If a stone falls to the bottom of a mineshaft in 6 seconds, then the depth of the shaft is about A) 60 m. B) 120 m. C) 180 m. D) more than 200 m. Answer: C Diff: 2 Topic: Free Fall 36) If a freely falling object were equipped with a speedometer, its speed reading would increase each second by about A) 5 m/s. B) 10 m/s. C) 15 m/s. D) a variable amount. E) depends on its initial speed Answer: B Diff: 1 Topic: Free Fall

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    9 37) If a freely falling object were equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2, then its speed reading would increase each second by A) 10 m/s. B) 20 m/s. C) 30 m/s. D) 40 m/s. E) depends on its initial speed Answer: B Diff: 2 Topic: Free Fall 38) If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be A) constant. B) less and less each second. C) greater than the second before. D) doubled. Answer: C Diff: 1 Topic: Free Fall 39) An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be A) 10 m/s. B) 20 m/s. C) 30 m/s. D) 40 m/s. Answer: B Diff: 1 Topic: Free Fall 40) A ball is thrown upwards and returns to the same location. Compared with its initial speed its speed when it returns is about A) half as much. B) the same. C) twice as much. D) four times as much. Answer: B Diff: 2 Topic: Free Fall

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