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    karishma68's Avatar
    karishma68 Posts: 1, Reputation: 1
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    #1

    Sep 30, 2012, 12:03 AM
    Work and energy
    A force of magnitude 26N along direction of a vector 5i+12j displaces a body of mass 2 kg from a point (2,3,4) to a point (4,3,2). What is the work performed by the force?
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    ebaines Posts: 12,131, Reputation: 1307
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    Oct 1, 2012, 06:06 AM
    Work is equal to the dot product of the force vector and the displacement vector:



    So first determine the displacement vector, then calculate the dot product of it with the force vector.
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