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
2 N
B
20 N
C
200 N
D
400 N
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Centripetal Force (F\(_c\)) = \(\frac{mv ^2}{r}\)
= \(m\omega^2r\)
(Since V = \omegar)
F = 0.01 x \(100^2 \times 0.2 \)
F = 20 N
Source: Myschool Past Questions Archive (Record #302)