A man of mass "60kg" lifts a "15kg" mass to the top of a building of height "10m" in "5" minutes .His efficiency is

A piece of wood of mass 0.03 kg is dropped from the top of a building 100 m high. At the same time, a bullet of mass 0.02 kg is fired vertically upward with a velocity of 100 m/s from the ground the bullet gets embedded in the wooded piece after striking. find the height to which the combination rises above the building before it starts falling take g=10m//s^(2)

The power (P) of an engine lifting a mass of 100 kg up to a height of 10 m in 1 min is

A block of mass 1 kg is released from the top of a wedge of mass 2 kg. Height of wedge is 10 meter and all the surfaces are frictionless. Then

A ball of mass 2 kg is projected horizontally with a velocity 20m/s from a building of height 15m. The speed with which body hits the ground is :

The power output of machine that lifts a 600 kg crate through a height of 20 m in 1 minute, is

A man weighing 70 kg carries a 30 kg box to the top of a building 20 m high. Calculate the work done by the man (take g = 9.8 ms^(-2) ).

In the figure shown the man of mass 60kg is liftinga block of mass 10kg with an acceleration of 5m//s^(2) . Find reading of the machine.

A ball of mass 1 kg is dropped from 20 m height on ground and it rebounds to height 5m. Find magnitude of change in momentum during its collision with the ground. (Take g=10m//s^(2) )

A man of mass m=2kg is standing on a platform of mass M=5kg , then at any instant.

A fire man has to carry an injured person of mass 40 kg from the top of a building with the help of the rope which can withstand a load of 100 kg. The acceleration of the fireman if his mass is 80 kg, will be-