A mass of 0.5kg is whirled in a vertical circle of radius...
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
Correct answer is C
ω = 2πF = 2π × 2 = 4πrad−1
Centripetal force = mrω2
⇒ 0.5 × 2 × (4π)2
⇒ 157.75N
Approximately = 158N.