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How is the work done by a force measured...

How is the work done by a force measured when (i) force is in the direction of displacement, (ii) force is at an angle to the direction of displacement ?

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(A): The method of dimensions cannot be used to obtain the dependence of work done by a force when the force is inclined to the direction of displacement. (R): All trigonometric functions are dimensionless.

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ICSE- WORK ENERGY AND POWER-EXERCISE-2(A)
  1. Define work. When is work said to be done by a force ?

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  2. How is the work done by a force measured when (i) force is in the dire...

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  3. A Force F acts on a body and displaces it by a distance S in direction...

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  4. A body is acted upon by a force.State two conditions when the work don...

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  5. State the condition when the work done by a force is (a) positive ,(b...

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  6. A body is moved in a direction opposite to the direction of force acti...

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  7. When a body moves in a circular path ,how much work is done body?Give ...

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  8. A satellite revolves around a planet in a circular orbit. What is the ...

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  9. State whether work is done or not ,by writing yes or no,in following c...

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  10. A coolie X carrying a load on his head climbs up a slope and another c...

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  11. The work done by a fielder when he takes a catch in a cricket match is...

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  12. Give an example when work done by the force of gravity acting on a bo...

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  13. What are the S.I. and C.G.S units of work? How are they related ? Esta...

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  14. State and define the S.I. unit of work.

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  15. Express joule in terms of erg

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  16. A body of mass m falls down through a height h. Obtain an expression f...

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  17. A boy of mass m climbs up the stairs of vertical height h. (a) What is...

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  18. Define the term energy and state its S.I. unit

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  19. What physical quantity does the electron volt (eV) measure? How is it ...

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  20. Complete the following sentences : (a) 1J= …………ealorie . (b) 1 kWh …...

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