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संबंधित प्रश्न
A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:
- The work done by them.
- The power developed by them.
A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road.
Who does more work against the force of gravity and why?
State and define the S.I. unit of work.
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
What is a centripetal force?
How much force is applied on a body when 150 J of work is done in displacing the body through a distance of 10 m in the direction of the force?
Work done by a force is equal to the product of ....... and ....
In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.
A machine raises a load of 750 N through a height of 16 m in 5 seconds. Calculate the power at which the machine works.
