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What will happen to potential energy of...

What will happen to potential energy of a spring when it is compressed ?

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Potential energy will increase because work is done on the spring in compressing it .
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What wil happen to potential energy of a spring when it is streched ?

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Knowledge Check

  • The elastic potential energy of a spring

    A
    Increases only when it is stretched
    B
    Decreases only when it is stretched
    C
    Decreases only when it is compressed
    D
    Increases whether stretched or compressed

  • A block of mass m is initially moving to the right on a horizontal frictionless surface at a speed v. It then compresses a spring of spring constant k. At the instant when the kinetic energy of the block is equal to the potential energy of the spring, the spring is compressed a distance of :

    A
    `vsqrt(m //2k)`
    B
    `vsqrt(m //k)`
    C
    `vsqrt(m //4k)`
    D
    `mv^2//4k`

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