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Question

A chain of 125 links is 1.25 m long and has a mass of 2 kg. With the ends fastened together, it is set rotating at 3000 rev/min. The centripetal force on each link is :

A
3.14 N
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B
314 N
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C
13.14 N
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D
1314 N
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Solution

The correct option is B 314 N
Angular velocity :
ω=3000 rpm
=2π60×3000 rad/s
=100π
Mass of each link :
m=2125kg
Radius of circular path :
r=L2π
=1.252π
Total Centripetal force :
F=mω2r
=2125×[100π]2×1.252π
=314N

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