Question

A boy drops a coin from the top of the building which is 49m.high find the velocity of the coin (I want step by step answer)

Answer 1

As per energy conservation

potential energy at height h = kinetic energy at ground

mgh = (mv^2)/2

gh = v^2/2

v^2 = 2gh

v = √(2gh

v = √( 2×9.8×49

v = 30.99 m/s