Test Preparation on Physics-Newton's Law and Motion 2
A stretching force of 1000 newton is applied at one end of a spring balance and an equal stretching force is applied at the other end at the same time. The reading of the balance will be:
A ball of mass 10 gm hits vertically a hard surface with a speed of 5 ms-1 and rebounds with the same speed. The ball remains in contact with the surface for 1/100 sec. The average force exerted by the surface on the ball is
A ball of mass 100 gm is moving with a velocity of 10 ms-1 and hits a bat and rebounds with a velocity of 10 ms-1. The force of the blow by the bat acts for 0.01 seconds. The average force exerted on the ball by the bat is
A body of mass m falls from a height h1 and rises the a height h2. The magnitude of the change in momentum during the impact with the ground.
A body is moving with an acceleration
The weight of a person in a stationary lift is 70 kg. If the lift moves with a constant velocity of 7 ms-1 his weight in the moving lift is
A person of 70 kg weight is being lifted by a helicopter with a rope rising up with an acceleration of 4 m/s2. Tension is