CBSE - Force

How many dynes are equal to 1 N ? (1) 106 (2) 104 (3) 105 (4) 103

Between a football and stone of same size, the inertia of: (1) Football is greater. (2) Stone is greater. (3) Both the objects is equal. (4) None of the above.

When a bullet is fired from a gun. The gun recoils to - (1) conserve mass (2) conserve momentum (3) conserve K.E (4) none of these

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

A man throws a ball weighing 200 g vertically upwards with a speed of 10m/s. Its momentum at the highest point of its flight will be: (1) 2 kg. m/s (2) 2000 kg.m/s (3) Insufficient data to find the momentum. (4) zero.