A hammer of mass 1 kg strikes on the head of a nail with a velocity `10ms^(-1)`. It drives the nail 0.1m into a wooden block. Calculate the force applied by the hammer and the time of impact.

A ball of mass 100 g moving with a velocity of 10ms^-1 is stopped by a boy in 0.25sec. Calculate the force applied by the boy to stop the ball.

A bullet of mass 10 kg travelling horizontally with a velocity of 150 ms^(-1) strikes a stationary wooden block and come to rest in 0.03 s. Calculate the distance of penetration of the bullet into the block. Calculate the magnitude of force exerted by the wood in block in the bullet.

A bullet of mass 0.03 kg is fired from a gun of mass 3 kg which leaves the muzzle of the gun write a velocity of 100ms^(-1) . If bullet takes 0.003 s to come out of the gun then calculate the force acting on the gun.

An object of mass 1 kg travelling in straight line with a velocity of 10 ms^(-1) collides with it and sticks to a stationary wooden block of mass 5 kg. Then both move off together in the same straight line. Calculate the total momentum before the impact and just after the impact. Also calculate the velocity of combined object.