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प्रश्न
Is power a scalar or a vector quantity?
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उत्तर
Power is a scalar quantity.
संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
Work done = Force × ........................................
How is work related to energy?
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
List any six forms of energy and write a short note on each of them.
Fill in the boxe to show the corresponding energy transformation.
Give an example
Chemical energy changes to electrical energy.
What is power? How do you differentiate kilowatt from kilowatt-hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of waterfalls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s–2)
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
