Work, Energy an...

A smooth sphere of mass M moving with velocity u directly collides elastically with another sphere of mass in at rest. After collision their final velocities are V and v respectively. The value of u is

A body of mass m having an initial velocity v, makes head on collision with a stationary body of mass M. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will happen only when

A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m/4 remains stationary. The velocity of the other shell will be

A rubber ball is dropped from a height of 5 m on a planet where the acceleration due to gravity is not known. On bouncing, it rises to 1.8 m. The ball loses its velocity on bouncing by a factor of

A ball of mass 10 kg is moving with a velocity of 10 m/s. It strikes another ball of mass 5 kg which is moving in the same direction with a velocity of 4 m/s. If the collision is elastic, their velocities after the collision will be, respectively

A body of mass 2 kg collides with a wall with speed 100 m/s and rebounds with same speed. If the time of contact was 1/50 second, the force exerted on the wall is

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 hail is dropped from a height h. lithe coefficient of restitution he e, then to what height will it rise after jumping twice from the ground