CBSE - Force

When a car stops suddenly we fall forwards, this is because: (1) Our body tends to continue to be in motion due to inertia. (2) Of a reaction force. (3) Of momentum. (4) Centripetal force.

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 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.

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