Work, Energy an...

A body moving with velocity v has momentum and kinetic energy numerically equal. What is the value of v

If the momentum of a body is increased by 100%, then the percentage increase in the kinetic energy is

Four particles given, have same momentum. Which has maximum kinetic energy

A machine which is 75 percent efficient, uses 12 joules of energy in lifting up a 1 kg mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in m/s^-1)

The kinetic energy of a body of mass 3 Kg and momentum 2 Ns is

A ball of mass 2 kg and another of mass 4kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of

The coefficient of restitution e for a perfectly elastic collision is

Two solid rubber balls A and B having masses 200 and 400 g respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

A body of mass `M\' collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take initial direction of velocity as positive)

In an elastic collision of two particles the following is conserved