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When do we say that work is done?...

When do we say that work is done?

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R G PUBLICATION-WORK AND ENERGY-EXAMPLE
  1. A force of 7 N acts on an object. The displacement it, say 8m, in the ...

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  2. When do we say that work is done?

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  3. Write an expression for the work done when a force is action on an obj...

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  4. Define 1 J of work.

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  5. A pair of bullocks exerts of force of 140 N on a plough, The field bei...

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  6. What is the kinetic energy of an object?

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  7. Write an expression for the kinetic energy of an object.

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  8. The kinetic energy of an object of mass, m moving with a elocity of 5 ...

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  9. What is power?

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  10. Define 1 watt of power.

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  11. A lamp consumes 1000J of electrical energy in 10s. What is the power?

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  12. Define average power.

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  13. An object thrown at a certain angle to the ground moves in a curved pa...

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  14. A battery lights a bulb. Describe the energy changes involved in the p...

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  15. Certain force acting on a 20 kg mass changes its velocity from 5 m s^-...

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  16. A mass of 10 kg is a point A on a table. It is moved to a point B. If ...

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

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

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  19. Does the transfer of energy take place when you push a huge rock with ...

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  20. A certain household has consumed 250 units of energy during a month. H...

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