A labour lifts 100 stones to a height of 6m in two minutes. If mass of each stone be 1kg, calculate the average power of the labourer. Take g=`10ms^(-1)1`.

A boy lifts a mass of 300g for 1.2 second at height of 4m. What would be the power of boy? (Take g=10ms^(-2) ).

A crane lifts a mass of 100 kg to a height of 10m in 20s . The power of the crane is (Take g = 10 ms^(-2))

A crane lifts a mass of 100 kg to a height of 10 m in 20 s. The power of the crane is (Take g = 10 m s^(-2) )

A crane lifts a mass of 100 kg to a height of 10 m in 20 s. The power of the crane is (Take g = 10 m s^(-2) )

A person lifts a stone of mass 100 g from the ground to a height of 1.5 m and projects it with a speed 4 m/s . If the process takes 1.5 s then calculate power of the person .