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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
- If mass is doubled and velocity is halved then new kinetic energy is
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- When the force retards the motion of the body, the work done is :
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- In which of the following examples, work done is negative?
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- In which of the following applications is work is not done?
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- For a force to do maximum work, what should be the angle between force...
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- State the SI unit of potential energy.
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- What is the commercial unit of electical energy? Represent it in terms...
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- A boy throws a rubber ball vertically upwards. What kind of work is do...
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- A boy throws a rubber ball vertically upwards. What kind of work is do...
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- A person holds a bundle of hay over his head for 30 minutes and gets t...
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- Express kilowatt hour in terms of joules.
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- Two children A and B each weigh 20 kg climb a rope up a height of 10 m...
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- Two children A and B each weigh 20 kg climb a rope up a height of 10 m...
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- In a house 3 bulb of 25 W. Each are used for 5 hours a day. Calculate ...
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- State the law of conservation of energy. Show that the energy of a fre...
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- The work done on a object does not depend upon the
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- In case of negative work the angle between the force and displacement ...
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- Water stored in a dam possesses
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- Which one of the following is not the unit of energy?
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- Two boys A and B do equal work. They will have equal power if
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