Question

Illustrate the energy changes which occur when a stone of mass 'm'is dropped freely from a height 'h'

Answer 1

For this u must know ,the energy- conservation theorum
It states that The Total Energy of the universe is constant
At height h
It has only potential energy
U= mgh
K= 1/2 mu²= 0 ,since u(initial velocity)= 0
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At the ground level
U= 0 as h=0
Let in travelling a distance 'h' it gains a velocity v
K= 1/2mv².
Therefore all its potential energy changes to kinetic energy.