Force Test - 1...

A net force of 10 N produces an acceleration of 5 ms^-2. Calculate the net force required to accelerate the same object at the rate of 1 ms^-2.

A force acts for 0.2 s on a body of mass 2.4 kg, initially at rest. The force then ceases to act and the body moves with a velocity of 4 m/s. What is the magnitude of the force?

A force of 8 N is applied on an object for 3.0 s to change its velocity from 20 ms^-1 to 40 ms^-1. What is the mass of the object?

A motorcar of mass 1000 kg is moving with a velocity of 54 km/hr and it takes 3 s to stop the motorcar after the brakes are applied. What is the force exerted by the brakes on the motorcar?

A ball of mass 30 g is moving with a velocity of 10 cm/s. What is the force required to bring it to rest in 0.1 s?

On jumping from a moving bus or a train, a man falls forward. What is the reason behind this?

Why is a man hit harder when he falls on a concrete floor than on sand from the same height?

When a boy pulls a cart, which force causes him to move forward?

A ball thrown vertically upwards by a person in a moving train comes back to his hand. Identify the law.