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1 May 2023
9. A baseball (mass = 145 g) is thrown straight upward with kinetic energy 2.90 J.
(a) When the ball has risen 2 m, find the work done by gravity. (Take g = 10 
)
_____ J
(b) Find the ball's kinetic energy.
_____ J
(c) Find the ball's speed.
_____ m/s
9. A baseball (mass = 145 g) is thrown straight upward with kinetic energy 2.90 J.
(a) When the ball has risen 2 m, find the work done by gravity. (Take g = 10 )
) _____ J
(b) Find the ball's kinetic energy.
_____ J
(c) Find the ball's speed.
_____ m/s
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