SAT Subject Physics Practice Question 311: Answer and Explanation

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Question: 311

7. The graph below shows an object that is thrown almost straight up from the top of a ten-story building.

At what point on the graph does the kinetic energy of the object decrease while the potential energy increases?

A.
B.
C.
D.
E.

Correct Answer: A

Explanation:

The correct answer is (A). The object is thrown upwards. The kinetic energy the object possesses when it is first thrown is lost in the conversion to potential energy as the object rises away from the earth while slowing to a stop in the earth's gravitational field.

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