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Question

The breaking strength of a string is 55 kg wt. The maximum permissible speed of a stone of mass 5 kg which is revolved in a vertical circle of radius 4 m with the help of this string is (g=10m/s2):


  1. 10 m/sec
  2. 15 m/sec
  3. 20 m/sec
  4. 25 m/sec

A
20 m/sec
B
10 m/sec
C
25 m/sec
D
15 m/sec
Solution
Verified by Toppr

Tmax=55 kg wt.
=55 N.
T is maximum at bottom point.
where,
Tmg=mv2R

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