A person standing on a bridge at a height of 115m above river drops a 0.250kg...

A person standing on a bridge at a height of 115m above river drops a 0.250kg rock. A). What is the rock's total mechanical energy at the time of release relative to the surface of the river? B). What are the rock's kinetic, potential, and total mechanical energies after it has fallen 75.0m? C). Just before the rock hits the water, What are its speed and total mechanical energy? D). Answer parts (A)-(C) for reference point (y=0) at the elevation where the rock is released.

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genius_generous answered 1 year ago

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