A body of mass 5 kg is thrown vertically upwards with an initial velocity of 50 m. What will be its potential energy at the end of 5 s?
Given, m = 5kg, u= 50m, t = 5s,
g = 10m
Height covered by the body in 5 s is h = ut + ${{g}^{2}}$
= 50x5 - 1/2 x10x 5 x 5
= 250 - 125= 125 m
Therefore, PE of the body after 5 s
= mgh = 5 X 10 x 125 = 6250J