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 long is the ball in the air when it returns to its original position?
A)4.0 s
B)4.6 s
C)8.0 s
D)9.2 s
E)16 s

Question

Quizplus · Accepted Answer

The Answer of 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 long is the ball in the air when it returns to its original position?
A)4.0 s
B)4.6 s
C)8.0 s
D)9.2 s
E)16 s

A Brass Ball Is Shot Vertically Upward from the Surface