A mass of 0 5kg is whirled in a vertical circle... - JAMB Physics 2019 Question
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
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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