A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s.
-How high does the ball rise?
A)70.0 m
B)10.0 m
C)50.0 m
D)20.0 m
E)40.0 m

Question

Quizplus · Accepted Answer

The ball's velocity decreases by 5 m/s every second, indicating a constant acceleration (or deceleration) of -5 m/s². Using the formula v² = u² + 2as, where v = 0 m/s (at the highest point), u = 20 m/s, and a = -5 m/s², we find the maximum height s = 40 m.

A Brass Ball Is Shot Vertically Upward from the Surface