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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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Knowledge Check

  • Velocity displacement graph of a particle moving in a straight line is as shown in figure.

    A
    magnitude of acceleration of particle is decreasing
    B
    magnitude of acceleration of particlre is increasing
    C
    acceleration versus displacement graph straight line
    D
    acceleration versus displacement graph is parabola

  • Velocity-time graph of a particle moving in a straight line is shown in the figure. Mass of the particle is 2 kg. Work done by all the forces acting on the particle in time interval t = 0 to t = 10 sec is

    A
    300J
    B
    `-300J`
    C
    zero
    D
    `-400 J`

  • The velocity-time graph of a particle moving in a straight line is shown in figure. The mass of the particle is 2kg . Work done by all the forces acting on the particle in time interval between t=0 to t=10s is

    A
    (a) `300J`
    B
    (b) `-300J`
    C
    (c) `400J`
    D
    (d) `-400J`
    • NARAYNA-WORK , ENERGY & POWER -EXERCISE -II (H.W)
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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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