Suppose the gravitational acceleration on a certain planet is only 4.0 m/s2. A space explorer standing on this planet throws a ball straight upward with an initial velocity of 24 m/s. Assume that upward direction is positive. What is the velocity of the ball 3 seconds after it is thrown?

Question

Jean Mullins

Physics

11 September, 05:40

Suppose the gravitational acceleration on a certain planet is only 4.0 m/s2. A space explorer standing on this planet throws a ball straight upward with an initial velocity of 24 m/s. Assume that upward direction is positive. What is the velocity of the ball 3 seconds after it is thrown?

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Answers (1)

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Heaven Mason · Answer 1

12 m/s

Explanation:

a = 4 m/s^2

u = 24 m/s

t = 3 second

Let the velocity of the ball after 3 second is v.

Use first equation of motion

v = u + a t

v = 24 - 4 x 3

v = 24 - 12 = 12 m/s