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    sandman297's Avatar
    sandman297 Posts: 1, Reputation: 1
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    #1

    Nov 8, 2012, 08:39 AM
    Force, Work problem..
    A constant force, (2.17, -4.35, 1.45) N, acts on an object of mass 15.1 kg, causing a displacement of that object by (2.89, 3.95, -1.71) m. What is the total work done by this force?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 8, 2012, 09:32 AM
    Use .

    Do you know how to calculate the dot product of the force and displacement vectors? If you have two vectors where and , then the dot product is .
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