Question on: JAMB Physics - 2019

A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of 2 rev/s. Calculate the centripetal force

A

164N

B

160N

C

158N

D

172N

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Correct Option: B

ω = 2πF = 2π × 2 = 4πrad\(^{-1}\)
Centripetal force, Fc = mrω\(^2\)
Fc = 0.5 × 2 × (4π)\(^2\)
Fc = 160N

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