A 0.20 kg mass is whirled round in a vertical circle on the end of a light string of length 0.90 m. At the top point of the circle the speed of the mass is 8.2 ms. What is the tension in the string at this point? The string is now moved such that the circle is horizontal and the speed of the mass remains 8.2 ms'. b) Calculate the angle, in degrees, through which the string turns in 0.50 s. c) Calculate the tension in the string.You may assume that the string is horizontal. d) The string will break when the tension exceeds 60 N.Calculate the number of revolutions that the ball makes in one second when the tension is 60 N.

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