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संबंधित प्रश्न
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Name the forms of energy which a wound-up watch spring possesses.
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
State the SI unit of work.
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 happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
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.
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
What is work?
