Advertisements
Advertisements
प्रश्न
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).
Advertisements
उत्तर
Given m = 50 kg, g = 10N kg−1, d = 25 m, t = 5s.
Force of gravity F = mg
= 50 × 10
= 500 N
Work done W = F × d
= 500 × 25
= 12,500 J
Power P =`"W"/"t" = (12,500)/5=2500"W".`
संबंधित प्रश्न
State two conditions when no work is done by a force.
State the S.I. unit of energy.
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
What is meant by a translational motion? Give one example.
Can every force produce work?
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?
