Q176 / 200 · Manipal (MET) 2011 · Physics

A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

  • A
    when the mass is at the highest point of the circle
  • Correct answer
    B
    when the mass is at the lowest point of the circle
  • C
    when the wire is horizontal
  • D
    at an angle of $\cos ^{-1}\left(\frac{1}{3}\right)$ from the upward vertical

Solution

The tension at the highest point is zero, but tension at the lowest point is 6 times the weight of the body. Hence, wire is most likely to break at the lowest point.

Hence, the correct answer is option: 'B'.

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