CBSE - Force

A bullet of mass 0.01 kg is fired from a gun weighing 5.0 kg. If the initial speed of the bullet is 250 m/s, calculate the speed with which the gun recoils- (1) – 0.50 m/s (2) – 0.25 m/s (3) + 0.05 m/s (4) + 0.25 m/s

A body of mass M strikes against wall with a velocity v and rebounds with the same velocity. Its change in momentum is - (1) zero (2) Mv (3) –Mv (4) –2 Mv

When a bus starts suddenly the passengers standing on it, lean backwards in the bus. This is an example of - (1) Newton&#39;s first law (2) Newton&#39;s second law (3) Newton&#39;s third law (4) none of Newton&#39;s law

A ball of mass 5 kg moving at 3 m/s collides with another ball of mass 3 kg moving at 5 m/s in the same direction. If the balls move together after the collision in the same direction, find their common velocity. (1) 5 m/s (2) 3.75 m/s (3) 6.25 m/s (4) 7.5 m/s

Two balls A and B, of masses m and 2m are in motion with velocities 2v and v respectively. Compare the force needed to stop them in the same time. (1) 2 : 1 (2) 1 : 2 (3) 1 : 1 (4) None of the above