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If overset rarr F is the force applied b...

If `overset rarr F` is the force applied by the agent to produce a velocity `overset rarr v` in a body,then power supplied by the agent is :

A

`overset rarr F xx overset rarr v`

B

`overset vec F . overset vec v`

C

`overset vec F // overset vec v`

D

`overset vec F + overset vec v`.

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JBD PUBLICATION-MODEL TEST PAPER-02-EXERCISE
  1. Femto is a unit of time.(True//False)

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  2. Displacement of moving body cannot be :

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  3. If overset rarr F is the force applied by the agent to produce a veloc...

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  4. Friction is always harmul in life.(Yes// No)

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  5. Define angular frequency of rotating body.

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  6. What do you mean by reversible and irreversible process? Give example.

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  7. What do you mean by mean free path of a gas molecule?

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  8. What kinds of energies are posssessed by an oscillating body?

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  9. Draw a graph to show the motion of a body: with constant velocity.

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  10. Draw a graph to show the motion of a body: under constant retardation.

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  11. A bomb of mass 10 kg at rest explodes into two parts of 3 kg and 7 kg....

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  12. A force of 100 N acts on a body at an anle 30^@ with the horizontal.If...

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  13. Prove mathematically that the value of acceleration due to gravity has...

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  14. Define Angle of contact.

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  15. What are the limitations of dimensional analysis?

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  16. Write four characteristics of any natural force.

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  17. Using time velocity graph,derive the relationv^2-u^2 = 2aS,where every...

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  18. From second law of motion ,prove that F = ma and hence deduce first la...

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  19. Show that sum of P.E. and k.E. of a freely falling body is conserved.

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  20. Why does a body becomes weightless at the centre of earth ?

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