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Physics, 09.09.2021 03:30 annan65

A rock it thrown vertically upward with a speed of 200 m/s. When the rock returns, falls into hd 100 m deep, What is the rock's velocity as it hits the bottom of the hole
B. How long is the rock in the air, from the instant is released until it hits the bottom of the hole

PLEASE HELP thank you in advance!!

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