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Does potential energy of a spring decrea...

Does potential energy of a spring decrease `//` increase when it is compressed or stretched ?

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When a spring is compressed or stretched, potential energy energy of the spring increases in both the cases. This is because work is done by us in compression as well as stretching.
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PRADEEP-WORK, ENERGY AND POWER-Very Short Anwer Question.
  1. Name the largest and smallest practical unit of energy.

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  2. Is work done by a non conservative force always negative ? Comment.

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  3. Does potential energy of a spring decrease // increase when it is comp...

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  4. When an air bubble rises in water, what happens to its potential energ...

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  5. Name the process in which momentum changes but KE does not.

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  6. A shot fired from a cannon explodes in air. What will be the changes i...

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  7. The momentum of an object is doubled. How does its K.E. change?

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  8. Can P.E. of an object be negative?

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  9. Does the work done in moving a body depend on how fast or how slow the...

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  10. A spring is cut into two equal halves. How is the spring constant of e...

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  11. Is it possible exert a force which does work on a body without changin...

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  12. In case of a moving body as force of friction is mumg, can we regard m...

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  13. A ball of mass m moving with vel. V strikes head on elastically with a...

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  14. Is it possible to have a collision in which the whole of KE is lost?

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  15. If two objects collide and one is initially at rest (a) is it possible...

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  16. In which, elastic or inelastic collision, the momentum is conserved ? ...

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  17. Which physical quantities are conserved in an elastic collision?

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  18. Which physical quantity is conserved in both, elastic and inelastic co...

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  19. If two bodies stick together after collision. Will the collision be el...

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  20. A bullet gets embedded in a wooden block. Where does its KE go?

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