CBSE - Force

Identify from the following, the case where balanced force acts on it. (1) A person resting on an arm chair. (2) A lorry travelling at a variable speed on a straight road. (3) A cyclist braking. (4) A car that has a deceleration of 10 m/s 2

If an object moves with a uniform velocity we can conclude that (1) there is no force acting on the body (2) no unbalanced force acts on it (3) an unbalanced force acts on the body (4) it has uniform acceleration

Inertia depends upon - (1) acceleration of the body (2) velocity of the body (3) shape of the body (4) mass of the body

Momentum has same unit as - (1) impulse (2) torque (3) moment of force (4) couple

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