A ring is rotating about a diameter. The radius = 5cm & mass of ring – McqOptions

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1.	A ring is rotating about a diameter. The radius = 5cm & mass of ring = 1kg. A force is applied on the ring such that it is perpendicular to the axis and vector AB as shown in the figure. The magnitude of force is 10N. Find the work done by the torque, when the ring rotates by 90°.
A.	0.25π J
B.	0.15π J
C.	0.2π J
D.	0
Answer» D. 0

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