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 Answer: Option B

B. 160N

Explanation

ω = 2πF = 2π × 2 = 4πrad−1
Centripetal force = mrω2
⇒ 0.5 × 2 × (4π)2
⇒ 160N