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

Physics
JAMB 2019

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
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Correct Answer: Option C
Explanation

ω = 2πF = 2π × 2 = 4πrad\(^{-1}\)
Centripetal force = mrω\(^2\)
⇒ 0.5 × 2 × (4π)\(^2\)
⇒ 157.75N

Approximately = 158N.

There is an explanation video available below.


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Explanation Video

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