A body of mass 2 kg falls 60 m from rest and is then brought to rest after penetrating `0.6` m into some sand . Find the average thrust of the sand on it .

A stone of mass 5kg falls from the top of a cliff 50m high and buries 1m deep in sand . Find the average resistance offered by the sand and the time it takes to penetrate .

A body of mass 2kg starts from rest and moves with uniform acceleration. It acquires a velocity 20ms^-1 in 4s . Find average power transferred to the body in first 2s .

A body of mass 2 kg is moving on the ground comes to rest after some time. The coefficient of kinetic friction between the body and the ground is 0.2. The etardation in the body is

A body of mass 0.02 kg falls from a height of 5 metre into a pile of sand. The body penetrates the sand a distance of 5 cm before stoping. What force has the sand exerted on the body ?

A body of mass 2 kg is moving with a velocity 8m//s on a smooth surface. If it is to be brought to rest in 4 seconds, then the force to be applied is

A body of mass m falls from a height h and collides with another body of same mass at rest. After collision, the two bodies combine and move through distance (d) till they come to rest. Find the work done against the resistive force.

A cricket ball of mass 0.2 kg moves with a velocity of 20 m/s and is brought to rest by a player in 0.1 s. Calculate the impulse of the ball and average force applied by the player.

A body of mass 4 kg collides elastically with another body of mass 2 kg at rest. If time of collision is 0.02 sec and average impulse force acted on each body is 100N, find the velocity of 4kg body before and after collision (Assuming collision takes place on a smooth horizontal surface)