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    edie1950's Avatar
    edie1950 Posts: 1, Reputation: 1
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    #1

    Feb 12, 2010, 08:21 PM
    Hooke Law the distance d when a spring is streched by a hanging object varies directl
    Hooke Law the distance d when a spring is streched by a hanging object varies directly as the weight w of the object. If the distance is 61cm when the weight is 2kg. What is the distance when the weight is 7kg
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    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Feb 16, 2010, 06:48 AM

    Use the law. The first sentence:



    So, inserting a constant:



    Use the given values:



    Find k.

    Then, you'll have where you know the value of k.

    You can now find the distance d, by multiplying the weight 7kg by the value of k you got before.
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