A pump extracts water from 50m depth and ejects per sec 10 kg water with a velocity of 10m/s.Calculate is power.

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/ s. calculate when and where the two stones will meet.

A rocket is ejecting 1 kg of gases per sec at a velocity of 60 km/s. The accelerating force on the rocket is

A ball of mass 150 gm is thrown vertically upward with a velocity of 10m/sec. What is its initial momentum?

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 scooter of mass 120 kg is moving with a uniform velocity of 108 km/h. Calculate the force required to stop the vehicle in 10 sec.

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.

Two organ pipe open in both end of length 50cm and 50.5 cm when sounded, number of beats per sec is 3. Calculate the velocity of sound in air.

A hockey ball of mass 200 g travelling at 10 m s^-1 is struck by a hockey stick so as to return it along its original path with a velocity at 5m s^1 . Calculate the change of momentum occured in the motion of hockey ball by the force applied by the hockey stick.

In a capillary tube of diameter 10^-3m , water rises to a height of 0.03 m. calculate the surface tension of water.

A ball of mass 150 gm is thrown vertically upward with a velocity of 10m/sec. What is the momentum at its highest point of ascend?