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# A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of...

### 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

### Explanation:

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

## Dicussion (1)

• ω = 2πF = 2π × 2 = 4πrad$$^{-1}$$
Centripetal force = mrω$$^2$$
⇒ 0.5 × 2 × (4π)$$^2$$
⇒ 160N