Physics
posted by James .
A ball having a mass of 4 kg is attached to a string 1 m long and is whirled in a vertical circle at a constant speed of 23 m/s.
(a) Determine the tension in the string when the ball is at the top of the circle.
(b) Determine the tension in the string when the ball is at the bottom of the circle.

Physics 
Elena
T(top ) = m(v²/R – g )
T(bottom ) = m(v²/R + g)
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