JAMB - Physics (2019 - No. 100)
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
164N
160N
158N
172N
Explanation
ω = 2πF = 2π × 2 = 4πrad\(^{-1}\)
Centripetal force = mrω\(^2\)
⇒ 0.5 × 2 × (4π)\(^2\)
⇒ 157.75N
Approximately = 158N.
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