A rock of mass 30kg is pushed off of a seaside cliff that is 32m above the sea. What is the kinetic energy of the rock just before it hits the ground?
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Answer:
9408J
Explanation:
initial potential energy of the rock is mgh = 30×32×9.8=9408J
when it hit the ground all the potential energy will converted into kinetic energy
so kinetic energy of the rock is 9408J
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