A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4m/s by applying a force. The trolley comes to rest after traversig a distance of 16m. How much work is done by the girl ?

A stone of 1 kg is thrown with a velocity of 20 ms^( -1) across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice ?

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m st. Calculate the initial recoil velocity of the rifle.

Oif a force 20 N is applied on a body of mass 5 kg at rest then find the kinetic energy of the body after 10s.

A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves the barrel of the rifle at a vleocity of 100 m/s. If the bullet takes 0.003 second to move out of the barrel, calculate the force experienced by the rifle due to its recoil. Initially rifle+Bullet system at rest

How much work is done on a body of mass 1 kg whirling on a circular path of radius 5m?

A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15m s^-1 . How long does the body take to stop ?