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trigonometry

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A box of 200kN is placed on a smooth inclined plane 28° with the horizontal. To prevent the box from sliding down the plane, a rope is tied to it and fastened to a peg on the top of the incline as shown. Determine the pull on the string assuming that the rope is held parallel to the plane. (Hint: the pull in the string must be equal to the component of the weight of the box parallel to the palne)

  • trigonometry -

    m*g = 200,000N.

    Fp = mg*sin A = 200,000*sin28 = 98,894 N
    = Force parallel with the incline = The
    pull on the rope.

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