Mathematics, 23.06.2021 18:40 aaron2113

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.)

1,800 J

81,000 J

8,100 J

18,000 J

Answers: 3

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A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock’s gravitat...