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physics

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a framed picture of weight 15N is hung on a wall, using a piece of string. The ends of the string are tied to two points, 0.60 m apart on the same horizontal level, on the back of the picture.Find the tension in the string if the string is 1.0m long

  • physics - ,

    make two right triangles.
    Consider one side.

    Theta=arccos .3/.5

    but sinTheta=1/2 weight/tension

    tension=.5*15/sinTheta

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