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MCQ
A body of mass 1 kg is at the top of a vertical circle of radius 2 m moving at 6 m/s (g = 10 m/s^2). The tension in the string is:
Unit-4 Dynamics-2
A 18 N
B 8 N
C 0 N
D 28 N
Explanation

T = m(v^2/r - g) = 1 x (36/2 - 10) = 8 N.

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