Advertisements
Advertisements
प्रश्न
Can two agents, doing the same work, have different power?
Advertisements
उत्तर
Yes, since power = work/time the two agents can have different powers if they take different amounts of time to do the same work.
संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
What is the work done by the moon when it revolves around the earth?
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
What is meant by a translational motion? Give one example.
What is the SI unit of work?
Complete the following sentences:
1 H.P. = ........ W.
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Name the CGS unit of work.
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
