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The potential energy of a system increas...

The potential energy of a system increases if work is done

A

Upon the system by a nonconservative force

B

By the system against a conservative force

C

By the system against a non conservative force

D

Upon the system by a conservative force

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The correct Answer is:
B
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AAKASH SERIES-WORK POWER ENERGY-EXERCISE - 1A
  1. A vertical spring with force constant .k. is fixed on a table. A ball ...

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  2. An engine pumps water continuously through a hose Water leaves the hos...

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  3. The potential energy of a system increases if work is done

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  4. A body projected vertically from the earth reaches a height equal to e...

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  5. The potential energy of a particle in a force filled is U=(A)/(r^(2))-...

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  6. A car of mass .m. starts from rest and accelerates so that the instant...

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  7. A particle of mass .m. is driven by a machine that delivers constant p...

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  8. Kinetic energy, with any reference, must be

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  9. Which of the following is a non - conservative force ?

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  10. A molecule of mass m of an ideal gas collides with the wall of a vesse...

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

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  12. A bullet is fired from a rifle. If the rifle recoils freely, then the ...

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  13. A boy carrying a box on his head is walking on a level road from one p...

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  14. Identify the false statement from the following.

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  15. The balades of a windmill sweep out a circle of area A. If the wind fl...

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  16. A particle with total energy E is moving in a potential energy region ...

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  17. A particle is acted upon by a force of constant magnitude which is alw...

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  18. A particle of mass m moving with velocity v collides with a stationary...

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  19. Two spheres A and B collide. If the momentum of A is doubled in the co...

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  20. Internal force can change

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