Two bodies of masses `5Kg`and `20Kg` are allowed to fall freely from a height of `50m` .When they are at a height of `20m` from the ground ,the ratio of their potential energies is

A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the ball, the rise in its temperature is (specific heat of steel =460 K//kg^(@)//C,g=10 m//s^(2) )

Two bodies of masses M and m are allowed to fall from the same height. It the resistance for each be the same, then, will both the bodies reach the earth simultaneously ?

A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g=10ms^(-2)]

Two identical masses of 5 kg each fall on a wheel from a height of 10 m . The wheel disturbs a mass of 2 kg water, the rise in temperature of water will be :-

A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. (a)Taking g=10 m s^(-2) ,Calculate : (i)the potential energy possessed by the ball when it is initially at rest. (ii)the kinetic energy of the ball just before it his the ground? (b)What happens to the mechanical energy after the ball his the ground and comes to rest ?

In the case of a body freely falling from small height

A body falls on a surface of coefficient of restitution 0.6 from a height of 1 m . Then the body rebounds to a height of

A stone projected vertically upwards from the ground reaches a maximum height h . When it is at a height (3h)//(4) , the ratio of its kinetic and potential energies is

Two spherical bobs, one metallic and other of glass, of the same size are allowed to fall freely from the same height above the ground. Which of the two would reach the ground earlier and why ?