Work, Energy an...

A body falling from a height of 10 m rebounds from hard floor. If it loses 20% energy in the impact, then coefficient of restitution is

A neutron makes a head-on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is

A uniform chain of length L and mass M is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, the work required to pull the hanging part on to the table is

A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then

The kinetic energy acquired by a mass m in travelling a certain distance d starting from rest under the action of a constant force is directly proportional to

A body is moved along a stright line by a machine delivering constant power. The distance moved by the body in time t is proportional to

A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ or energy. The initial velocity of the shell is

The coefficient of restitution e for a perfectly inelastic collision is

A 50 g bullet moving with velocity 10 m/s strikes a block of mass 950 g at rest and gets embedded in it. The loss in kinetic energy will be

A particle of mass m moving with velocity v striles a stationary particle of mass 2m and sticks to it. The speed of the system will be