If a man lifts a load up with the help of rope such that it raises the load of mass 50 kg to a height of 20 m in 100 seconds. Find the power of man. (Take`g = 10ms^-2`)`

Calculate the power of a crane in watts,which lifts a mass of 100 kg to a height of 10 m in 20 s.

Calculate the power of a crane in watts, which lifts a mass of 100 kg to a a height of 10 m in 20s.

A tank of capacity 10^3 kg is placed at the top of a house 10 m high.This tank is filled by a motor in 30 minutes by lifting water from a 20 m deep well.Find the power of motor(Take g=10m s^(-2) .

A man pushes a body of mass 10 kg placed on a rough surface of co-efficient of friction 0.3 by a distance 5 m in 10 seconds,find his power.

A person carrying 10 bricks each of mass 2.5 kg. on his head moves to a height 20 metres in 50 seconds. Calculate the power spent in carrying bricks of the person.

The power of a motor pump is 5 kW. How much water per minute the pump an raise to height of 20 m ? Take g = 10ms ^-2 .

Two stones are thrown up simultaneously from the edge of a cliff 200 m high with initial speeds of 15 m s^-1 and 30 m s^-1 . Verify that the graph shown in Fig. 3.27 correctly represents the time variation of the relative position of the second stone with respect to the first. Neglect air resistance and assume that the stones do not rebound after hitting the ground. Take g = 10 m s^-2 . Give the equations for the linear and curved parts of the plot.

Find the work done in lifting a 50 kg bucket a water through a vertical height of 2 m.