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Velocity-time graph of a particle of mas...

Velocity-time graph of a particle of mass (2 kg) moving in a straight line is as shown in Fig. 9.20. Find the word done by all the forces acting on the particle. .

A

400 J

B

`-400 J`

C

`-200 J`

D

`200 J`

Text Solution

Verified by Experts

The correct Answer is:
`(2)`

`W = Delta KE = 0 -1/2 xx 2 xx 400 = - 400J`
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NARAYNA-WORK , ENERGY & POWER -EXERCISE -II (H.W)
  1. Velocity-time graph of a particle of mass (2 kg) moving in a straight ...

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  2. The displacement of a body of mass 2 kg varies with time t as S = t^(2...

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  3. Th ework done in moving a body of mass 4 kg with uniform velocity of 5...

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  4. A body is acted upon by a force which is inversely proportional to the...

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  5. A particle of mass 0.5 kg is displaced from position vec r(1)(2,3,1) t...

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  6. Kinetic energy of a particle moving in a straight line varies with tim...

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  7. A force F acting on a particle varies with the position x as shown in ...

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  8. A force vec F=(2 hat i + 3hat j \- 4 hat k)N acts on a particle moves ...

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  9. Two forces each of magnitude 10 N act simultaneously on a body with th...

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  10. A body is displaced from (0,0) to (1 m, 1m) along the path x = y by a ...

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  11. A body of mass 5 kg at rest under the action of a force which gives i...

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  12. A particle is made to move from the origin in three spells of equal di...

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  13. A position dependent force F ia acting on a particle and its force-pos...

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  14. A force F acting on an object varies which distance x as shown in the ...

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  15. A body of mass m is allowed to fall with the help of string with downw...

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  16. Acceleration versus time graph of a particle moving in a straight line...

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  17. A rubber ball falling from a height of 5 m rebounds from hard floor to...

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  18. An elastic spring is compressed between two blocks of masses 1 kg and ...

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  19. A block of mass 2 kg is on a smooth horizontal surface. A light of for...

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  20. n' identical cubes each of mass 'm' and edge 'L' are on a floor. If th...

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