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Can there be a displacement of any objec...

Can there be a displacement of any object in the absence of any external force?

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A force of 7 N acts on an object. The displacement is, say 8 m in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this case ?

A force of 7 N acts on an object. The displacement is, say 8m in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work alone in this case?

PSEB-WORK AND ENERGY-EXERCISE
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  3. Certain force acting on a 20 kg mass changes its velocity from 5ms ^-...

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  4. A mass of 10 kg is at a point A on a table. It is moved to a point B. ...

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  5. The potential energy of a freely falling object decreases progressivel...

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  6. What are the various energy transformations that occur when you are ri...

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  7. Does the transfer of energy takes place when you push a huge rock with...

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  8. A certain household has consumed 250 units of electric energy during a...

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  9. An object of mass 40 kg is raised to a height of 5 m above the ground....

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  10. What is the work done by the force of gravity on a satellite moving ro...

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  11. Can there be a displacement of any object in the absence of any extern...

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  12. A person holds a bundle of hay over his head for 30 minutes and gets t...

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  13. An electric heater is rated 1500W. How much energy does it use in 10 h...

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  14. Illustrate the law of conservation of energy by discussing the energy ...

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  15. An object of mass, m is moving with a constant velocity,v. How much wo...

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  16. Calculate the work required to be done to stop a car of 1500 kg moving...

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  17. In each of the following a force,F is acting on an object of mass,m. T...

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  18. Soni says that the acceleration in an object could be zero even when s...

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  19. Find the energy in kW h consumed in 10 hours by four devices of power ...

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  20. A freely falling object eventually stops on reaching the ground. What ...

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