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संबंधित प्रश्न
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The loss in potential energy of the body,
State the SI unit of work.
What is the condition for a force to do work on a body?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Complete the following sentences:
1 H.P. = ........ W.
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
A water pump raises 50 kg of water through a height of 25 m in 5s. Calculate the power supplied by the pump (Take: g = 10 N kg−1).
