A ball of mass 100 g moving at a speed of 2 m/s strikes a plane surface at an angle of 450.The ball is reflected by the plane at equal angle of reflection with same speed. Find the magnitude of the change in momentum of the ball

A 1 kg ball moving (taking its direction to be positive) at 12 m/s collides head-on with a 2 kg ball moving in the opposite direction at 24 m/s. The velocity of each after impact (it coefficient of restitution is 2/3) respectively are

A 40 kg skater moving at 4 m/s overtakes a 60 kg skater moving at 2 m/s in the same direction and collides with him. Both the skaters move with the same velocity after collision. How much K.E. is lost?

A force acts on a mass of 40 kg and changes its velocity from 3 m/s to 12 m/s then the impulse of the force is

Sand drops from a stationary hopper at the rate 5 kg/s onto a conveyer belt moving with constant speed of 2 m/s. what is the power delivered by the motor drawing the belt

Two particles of mass m and 2m, moving in opposite directions collide elastically with velocities v and 2v. Their velocities after collision are respectively.