SAT Subject Physics Practice Question 530: Answer and Explanation

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Question: 530

1. This question relates to the velocity time graph shown below. Select the answer that is most representative of the physical quantity named.

At which point on the graph is no net force applied?

A. A
B. B
C. C
D. D
E. E

Correct Answer: B


The correct answer is (B). The velocity of the object is constant between the 3rd and 4th seconds. An acceleration is defined as the time rate change in velocity, a = Δv/Δt. If there is no change in velocity, there is no acceleration.

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