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MCQ
A body of mass 1 kg is at the bottom of a vertical circle of radius 2 m with a speed of 8 m/s (g = 10 m/s^2). The tension in the string is:
Unit-4 Dynamics-2
A 32 N
B 52 N
C 42 N
D 22 N
Explanation

T = m(v^2/r + g) = 1 x (64/2 + 10) = 42 N.

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