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QuestionPhysics

Object A is released from rest at height h. At the same instant, object B is thrown downward from the same location. Which of the following graphs of speed v as a function of time t is correct for the two objects?
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Answer

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Step 1:
Let's solve this step by step:

Step 2:
: Understand the Initial Conditions

- Object A is released from rest (initial velocity = 0) - Object B is thrown downward from the same location - Both objects are experiencing gravitational acceleration

Step 3:
: Analyze Gravitational Motion

- The speed-time relationship is given by: $$v(t) = g \cdot t
- For objects falling under gravity, the speed increases linearly with time

Step 4:
: Compare Initial Conditions for Objects A and B

v_{B}(t) = v_{0} + g \cdot t
- Object A (released from rest): - Object B (thrown downward):

Step 5:
: Graphical Representation

- Both objects will have a straight line graph - Object A's line will start at origin (0,0) - Object B's line will have a non-zero y-intercept (initial velocity)

Final Answer

The graph with a straight line through the origin represents Object A, and the graph with a straight line with a positive y-intercept represents Object B.