A chain of 125 links is 1 . 25 m long and has mass of 2 kg with the ends fastened together. It is set for rotating at 50 revolutions per second. The centripetal force on each link is

Question

A chain of 125 links is 1 . 25 m long and has mass of 2 kg with the ends fastened together. It is set for rotating at 50 revolutions per second. The centripetal force on each link is, 3 . 14 N, 0 . 314 N, 314 N, None of these

MARKS App · Accepted Answer

circumference = 2 π r = 1. 25 m so radius r = 1 .25 m 2 π = 0.199 m Mass of each link is m = 2 kg 125 = 0.016 kg angular velocity is w = 50 revolutions per second = 50 × 2 π rad s - 1 = 314 rad s - 1 The centripetal force on each link is f = m × r × w 2 = 0 .016 × 0 .199 × 314 2 N f = 314 N

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