An object of mass 100 kg is accelerated uniformly from a velocity of `5 m s^-1` to `8m s^-1` in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

Certain force acting on a 20 kg mass changes its velocity from 5 m s^-1 to 2m s^-1 . Calculate the work done by the force.

From a rifle mass 4kg a bullet of mass 50g is fired with an initia, velocity of 35 ms^-1 . Calculate the initial recoil velocity of the rifle.

A bullet of mass 40gm is fired from a gun of mass 8kg with a velocity of 800 m/s, calculate the recoil velocity of gun.

A bullet of mass 10 g travelling horizontally with a velocity of 150 m s^-1 strikes a stationary wooden block and comes to rest in 0.03 s. Calculate the distance of penetration of the bullet into the block.

What is the momentum of an object of mass m, moving with a velocity v?

rocket with a lift-off mass 20,000 kg is blasted, upwards with an initial acceleration of 5.0 m s~2. Calculate the initial thrust (force) of the blast.

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^-1 to 3.5 m s^-1 in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?

A motorcar of mass 1200 kg is moving along a straight line with a uniform velocity of 90 km/h. Its velocity is slowed down to 18 km/h in 4 s by an unbalanced external force. Calculate the acceleration and change in momentum. Also calculate the magnitude of the force required.

An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half way down.

A bullet of mass 10 g travelling horizontally with a velocity of 150 m s^-1 strikes a stationary wooden block and comes to rest in 0.03 s. Calculate the force exerted by the wooden block