March 30, 2017

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A ball is fastened to one en of a 28 cm string, and the other end is held fixed to a support. The ball whirls in a horizontal circle. Find the speed of the ball in its circular path if the string makes an angle of 35 degrees to the vertical.

  • Physics - ,

    A free body diagram of forces acting on the ball should tell you that
    Tan 35 = (mg)/(mv^2/R)
    = R g/ v^2
    The mass m cancels out.
    Solve for v.

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