Question

A object of mass m is released from a point at a heught h above the surfae of the earth show that its velocity wgeb it strick the earth syrface is given by

Answer 1

as the body is released from height h implies u=0
v =?
s=h
a=g
${v}^{2} - {u}^{2} = 2as$
${v}^{2} - {0 }^{2} = 2gh$
$v = \sqrt{2gh}$
this is the velocity with which an object will hit the earth on falling from height h