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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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Knowledge Check

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

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

  • The potential energy of a spring when streached by 2cm is U if the spring is strached by 8cm the potyential energy in it is

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

  • Assertion : A spring has potential energy, both when it is compressed or stretched. Reason : In compressing or stretching , work is done on the spring against the restoring force

    A
    Both A and are true and R is correct explanation of the assertion
    B
    Both A and R are true but R is not the correct explanation of the assertion
    C
    A is true, but R is false .
    D
    A is false, but R is true

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