Question on: JAMB Physics - 2021
Particles of mass 10\(^{-2}\)kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad\(^{-1}\). If the radius of the blade is 0.2m, the centripetal force is?
A
2N
B
20N
C
200N
D
400N
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Correct Option: B
Given:
m = 10\(^{-2}\)
w = 100rads\(^{-1}\)
F = mw\(^{2}\)r
r = 0.2m
= 10\(^{-2}\) x (100)\(^{2}\) x 0.2
= 20N
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