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

While dusting a carpet we beat it with a stick because: (1) Force applied on the carpet. (2) No inertia is involved. (3) Inertia of motion removes the dust. (4) Inertia of rest keeps the dust in its position.

Momentum of a body of mass 0.5 kg moving with a speed of 10 m/s is (1) 2.5 kg.m/s (2) 5 kg.m/s (3) 0.5 kg.m/s (4) 50 kg.m/s

Force measures rate of change of ........... a body (1) mass (2) inertia (3) velocity (4) momentum