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      Question

      A stone of mass 0.3 kg tied to the end of a string is

      whirled round in a circle of radius 1.2 m with a speed of 20 rev./ mim in a horizontal plane. What is the tension in the string? What is the maximum speed with which the stone can be whirl around if the string can withstand a maximum tension of 100 N?
      A 0.75 N, 20 m/s Correct Answer Incorrect Answer
      B 6.57 N, 34.6 m/s Correct Answer Incorrect Answer
      C 6.57 N, 39.6 m/s Correct Answer Incorrect Answer
      D 1.57 N, 20 m/s Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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