Derive the equation for kinetic energy.
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When we throw an object downwards from a height then its potential energy = mgh
where mass and acceleration due to gravity are constant but we need to find height by using third equation of motion
2ah=vsq.-usq. [sq.=square]
u=0
h=vsq./2a
put this value of height in mgh
m*g*vsq./2g
=1/2mvsq.
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