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 does it take the ball to reach its maximum height?
A)2.0 s
B)2.3 s
C)4.0 s
D)4.6 s
E)8.0 s

Question

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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 does it take the ball to reach its maximum height?
A)2.0 s
B)2.3 s
C)4.0 s
D)4.6 s
E)8.0 s

A Brass Ball Is Shot Vertically Upward from the Surface