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Q.

A stone tied to a rope is rotated in a vertical circle  with uniform speed. If the difference between the maximum and minimum tensions in the rope is 20 N, mass of the stone (in kg) is (Take, 9 = 10 ms-2)   [EAMCET 2013]

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a

0.75

b

1.0

c

1.5

d

0.5

answer is B.

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Detailed Solution

We know that, the difference between the maximum and minimum tensions in the rope,Tmax-Tmin=2mgHere,    Tmax-Tmin=20Now, mass of the stone,  m=202g=202×10=1 kg
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