Question

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 women, 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 forces 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

Answer 1

The correct option is 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

Since the racquetball is moving in upward direction, so the moment she is throwing the ball, the acceleration provided by her is greater than the deceleration caused by forces of earth.

So initially $F_w>F_g$