A body of mass 1.0kg dropped feom the top of a tower of height 50m what will be its k.e 10 m below the top
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Assuming that there is no air resistance (no heat energy produced) then the loss in gravitational potential energy (mgh) equals the gain in kinetic energy.
The kinetic energy at the top is zero (as there is no motion).
So, kinetic energy after falling 10 metres = m g h
= 1 x 9.81 x 10
= 98.1 J
In practice, there will be air resistance so the kinetic energy will be less than this answer.
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