Anonymous
Anonymous asked in Science & MathematicsPhysics · 5 months ago

A force is given by the vector F = 4i + 2j . The force moves an object along a straight line from the point (10, 5) to the point (12, 14).?

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  • 5 months ago

    Work = Force•Distance

    F = 4î + 2ĵ lbs

    D = (12-10)î + (14-5)ĵ ft = 2î + 9ĵ

    Use the dot product

    W = (4î + 2ĵ) • (2î + 9ĵ)

    W = (4)(2) + (2)(9) = 26 ft•lbs .......ANSWER B

  • 5 months ago

    (4i + 2j lb)(2i + 9j ft) = 26 ftlb

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