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SAT® Subject Test in Physics

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Difficult

Racquetball Thrown Straight Up

SATPHY-5S1QEK

The free-body diagram below shows the forces acting on a racquetball while a woman is in the midst of throwing it straight up high into the air (the lengths of the arrows representing the forces do NOT necessarily represent the relative strength of the forces).

In the free-body diagram, the upward force is the force exerted by the woman, and the downward force is the force exerted by the earth (the force of gravity). Assume there is no air resistance.

Which of the following statements is NOT true?

A

While the woman is throwing the racquetball, the magnitude of the average force she exerts on the racquetball is greater than the magnitude of the force the earth exerts on the racquetball.

B

While the racquetball is in the air, the magnitude of the upward force on the racquetball is equal to the magnitude of the force the earth exerts on the racquetball.

C

While the woman is throwing the racquetball, the magnitude of the force she exerts on the racquetball is equal to the magnitude of the force the racquetball exerts on her.

D

While the racquetball is in the air, the magnitude of the force the earth exerts on the racquetball is equal to the magnitude of the force the racquetball exerts on the earth.

E

While the woman is throwing the racquetball, the magnitude of the force the earth exerts on the racquetball is equal to the magnitude of the force the racquetball exerts on the earth.