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A horizontal force of 20 N is required t...

A horizontal force of 20 N is required to keep a body moving in a horizontal direction with constant velocity. What is the work done by the coolie?

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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. Give three situations in which a force produces displacement but still...

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  2. A horizontal force acts on a body placed on a smooth horizontal table ...

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  3. A horizontal force of 20 N is required to keep a body moving in a hori...

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  4. Find the work done in lifting a 50 kg bucket a water through a vertic...

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  5. Does kinetic energy of a body depend on the direction of motion of the...

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  6. When you are climbing stairs, work done by the weight is positive. (T ...

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  7. The ratio S.I unit to C.G.S. unit of work is .

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  8. Can every force do work?

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  9. When work is done on a body then kinetic energy of the body. (increase...

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  10. A book falls freely from the table top. Is work done by some force dur...

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  11. A boy sitting in a moving car possesses kinetic energy.

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  12. If momentum of a body is doubled, the kinetic energy becomes times.

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  13. Is energy a scalar or a vector quantity? Why?

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  14. What are the various forms of energy? Give some examples of each.

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  15. Define Kinetic energy. Give one example.

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  16. A boy of mass 18 kg is running with a speed of 12 km/h. Find the kinet...

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  17. Given that the kinetic energy of an object is 100 J. If the mass of ob...

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  18. A stationary football is kicked by a player such that it attains a spe...

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  19. Find the work done in in reasing the speed of car from 18 kmh^-1 to 36...

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  20. What is the force required to lift a book of mass m? This force is req...

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