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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 of the spring increases in both the cases. This is because work is done in compression as well as stretching .
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Knowledge Check

  • The potential energy of a system increase if work is done ……….

    A
    Upon the system by non conservative force
    B
    By the system against a conservative force
    C
    By the system against non conservative force
    D
    upon the system by conservative force

  • The potential energy of a long spring when stretched by 2cm is U. If the spring is stretched by 8 cm the potential energy stored in it is……….

    A
    `8U`
    B
    `16U`
    C
    `(U)/(4)`
    D
    `4U`

  • The length of a spring is increased by 2.5 cm the elastic potential energy stored in the spring is U . If the length is increased by 5 cm its elastic potential energy become ……

    A
    `U/2 `
    B
    4U
    C
    2U
    D
    `U/4`

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    Explain the elastic potential energy of spring and obtain an expression for this energy . (a)

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