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16-05-2024
Physics

Answered

A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock's gravitational potential energy before it was dropped. (Ignore the effects of friction.)
A. 8,100 J
B. 81,000 J
C. 18,000 J
D. 1,800 J

Answer :

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