A baseball is moving in the air along the customary parabola.Ignoring air drag,where is the force on the baseball zero?
A)at the top of the parabola
B)just when it has started upward
C)where it is about to impact
D)nowhere

Question

Quizplus · Accepted Answer

The force on the baseball is never zero because gravity acts on it throughout its trajectory, including at the top of the parabola.

A Baseball Is Moving in the Air Along the Customary