Laws Of Motion ...

A force which acts for a small time and also varies with time is called:

If two ends of a spring balance are pulled by a force of 10N, then the reading of the spring balance will be

Action and reaction do not cancel each other out because

The force exerted by the floor of an elevator on the foot of a person is _______ the weight of the person if the elevator is going up and speeding up.

A man weighs 70 kg. He stands on a weighing scale in a lift which is moving upwards with an acceleration of 5ms².What would be the reading on the scale? (g=10 ms²)

A ball of mass 150 gram moving at velocity of 15 metre per second is brought to rest by a player in 0.1 second calculate the force acting on the hands of player

An average force of 100N acts on a body for 1s. What is the impulse due to the force?

A ball weighing 0.01kg hits a hard surface vertically with a speed of 5m/s and rebounds with the same speed. The ball remains in contact with the surface for 0.01s. The average force exerted by the surface on the ball is

The principle of working of a rocket is based on

A bus can accelerate on a horizontal road due the force exerted by

The product of forceand the duration of time for which it acts on a body is equal to the

A block is placed on the table. What is the angle between the action of the block on the table and reaction of the table on the block?

The SI unit of impulse is

From the magnitude of impulse, it is possible to find the change in linear momentum because

A boy kicked a stone and got hurt. Which property of stone is responsible?

A man in the lift weighs more, when the lift

A machine gun has a mass of 20 kg fires 35 g bullets at the rate of 400 bullets per second with a speed of 400ms^-1 .What force must be applied to the gun to keep in the position?

 Which law says that every force is accompanied by an equal and opposite force?

A bomb of mass 16kg at rest, explodes into two pieces of masses 4kg and 12kg. After explosion, the velocity of the 12kg mass is 4m/s. What is the velocity of the 4kg piece?

The dimensional formula for impulse is