Question

A mass of 35 kg falls from a height of 750cm. Calculate (i) velocity of the body (ii) kinetic energy of the body when it just reaches the ground level. (iii) Does the velocity depend upon the mass of the particle? Explain​

Answer 1

Mass = m = 10kg

Initial height = h = 50cm

Converting into m = 0.5 m

g = 10m/s² (given)

a) Potential Energy of Mass just before dropping =

mgh = 10×10×0.5 = 50 J

b) Kinetic Energy of mass just on touching the ground = Potential Energy of mass just before dropping = 50J

c) If final Velocity with the mass hits the ground be v, then