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A body of mass 50 kg is at rest. The wor...

A body of mass 50 kg is at rest. The work doen to accelerate it by 20m/s in 10 s is

A

`10^3 J`

B

`10^4 J`

C

`2xx10^3J`

D

`4xx10^4J`

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SL ARORA-Work, Energy and power-EXERCISE
  1. Consider the situation - A laborer carrying bricks on his head on a le...

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  2. The force on a particle as the function of displacement x is given by ...

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  3. A body of mass 50 kg is at rest. The work doen to accelerate it by 20m...

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  4. Kinetic energy, with any reference, must be

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  5. The kinetic energy of a body becomes four times its initial value.The ...

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  6. A body of mass 5 kg is moving with a momentum of 10 kg m//s. A force ...

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  7. A block of mass 20 kg is moving in x-direction with a constant speed o...

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  8. The decrease in the potential energy of a ball of mass 20 kg which fal...

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  9. If the water falls from a dam into a turbine wheel 19.6 m below, then...

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  10. A gun fires a bullet of mass 50 g with a velociy of 30 m//s. Due to t...

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  11. A body of mass 5 kg is raised vertically to a height of 10 m by a forc...

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  12. A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg...

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  13. If a spring extends by x on loading, then the energy stored by the spr...

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  14. A spring 40 mm long is stretched by the application of a force. If 10 ...

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  15. The figure shows a smooth curved track terminating in a smooth horizon...

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  16. A particle moves along a curve of unknown shape but magnitude of force...

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  17. Which of the following is true ?

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  18. Two particles are seen to collide and move jointly together after the ...

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  19. A metal ball of mass 2 kg moving with a velocity of 36km//h has a head...

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  20. A particle of mass m, moving with velocity v collides a stationary par...

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