The power is one kilowatt if work is done at the rate of:
Correct answer: A. 1000 Js-1
- A. 1000 Js-1
- B. 1000 J min-1
- C. 100 Js-1
- D. 1000 Jh-1
Explanation
Work done by a body in one second is known as power. P = 1kW = 1000 W 1000 Js-I = 1000 J work in one second
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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