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27-09-2022
Physics

Answered

A tennis ball is thrown down towards the ground from a height h = 10 m with an unknown initial speed vo.
It hits the ground with a measured speed v = 20 m/s.
a. Draw a diagram of this problem, indicating a coordinate system and all known values.
b. Explain whether this is considered a freefall problem. Would you answer change if the ball were
thrown up, or not thrown at all and just dropped?
c. Calculate the unknown initial speed.
d. Determine the speed of the ball when it is 5 m above the ground.

Answer :

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