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प्रश्न
What is the power of a body which is doing work at the rate of one joule per second?
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उत्तर
1 watt is the power of a body working at the rate of 1 Joule per second.
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संबंधित प्रश्न
What is power?
Calculate the work done by the brakes of a car of mass 1000 kg when its speed is reduced from 20 m/s to 10 m/s?
A body does 1200 joules of work in 2 minutes. Calculate its power.
A trolley is pushed along a road with a force of 400 N through a distance of 60 m in 1 minute. Calculate the power developed.
Define power. Give the SI unit of power.
In an experiment to measure his power, a student records the time taken by him in running up a flight of steps on a staircase. Use the following data to calculate the power of the student :
Number of steps = 28
Height of each step = 20 cm
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Mass of student = 55 kg
Acceleration = 9.8 m s−2
due to gravity
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How much energy is transferred when one box is lifted?
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(g = 10 m s−2)
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How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, be able to lift at a constant speed of 1 m s–1 vertically? (g = 10 m s–2)
