Consider a thrown ball which has reached its highest point in flight. The magnitude of the acceleration
A) reverses direction.
B) is 2*g.
C) is zero.
D) is less than it will be a short instant later.
E) is g.

Question

Quizplus · Accepted Answer

At the highest point in its flight, a thrown ball is momentarily at rest (in terms of vertical velocity), but it is still subject to Earth's gravity. Therefore, the magnitude of its acceleration is $g$ (9.8 m/s$^2$ on Earth), directed downward. The direction of acceleration does not reverse, and it does not become zero or change until external forces act upon it.

Consider a Thrown Ball Which Has Reached Its Highest Point