Calculate the work done by a person in lifting a load of 20 kg from the ground and placing it 1 m high on a table `(AS_(1))`

Calculate the work done by a student in lifting a 0.5 kg book from the ground and keeping it on a shelf of 1.5 m height. (g = 9.8 m//s^(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 work required to be done to stop a car of 1500 kg moving at a velocity of 60kmh^(-1) .

Calculate the work done agains surface tension in blowing a soap bubble from a radius 10 cm to 20 cm if the surface tension of soap solution is 25xx10^(-3)N//m .

A truck starts from rest and accelerates uniformly at 2.0 m s^(-2) . At t = 10 s, a stone is dropped by a person standing on the top of the truck (6 m high from the ground). What are the (a) velocity, and (b) acceleration of the stone at t = 11s ? (Neglect air resistance.)

Work done by a body is shown as in figure . Calculate the work done during first 20 m distance covered .

Calculate the work done by a car against gravity in moving along a straight horizontal road . The mass of the car is 400 kg and the distance moved is 2 m .

A ball of mass 0.5 kg thrown upwards reaches a maximum height of 5m.Calculate the work done by the force of gravity during this vertical displacement considering the value of g =10m//s^(2) .