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Math Help - Spring force!

  1. #1
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    Exclamation Help me!

    A 200-g mas attached to the end of a spring causes it to stretch 5.0 cm. If another 200-g mass is added to the spring, the potential energy of the spring will be.
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  2. #2
    Super Member malaygoel's Avatar
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    Quote Originally Posted by Candy
    A 200-g mas attached to the end of a spring causes it to stretch 5.0 cm. If another 200-g mass is added to the spring, the potential energy of the spring will be.
    we have,initially,  mg=k(5cm) (spring is assumed to be massless)
    You could clculate k(spring constant) from it
    Finally, we have  2mg=kx
    Calculate x
    Potential energy= \frac{1}{2}kx^2

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