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A 3.8 kg ball is swung in a horizontal circle at the end of a 1.5 meter rope. If the tension in the rope is kept constant at 79 N, what is the period of rotation, T?

  • Physics - ,

    Well, ignoring gravity (gravity makes the ball swing downward, the rope makes an angle, which changes the radius of rotation), then

    tension= massball*v^2/r=m(2PIr/T)^2 /r

    do the algebra, and solve for Period T.

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