Particles of mass 10−2kg is fixed to the tip of a ...
Particles of mass 10−2kg 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?
2N
20N
200N
400N
Correct answer is B
Given
m = 10−2
w = 100rads−1
F = mw2r
r = 0.2m
F = ?
= 10−2 x (100)2 x 0.2
= 20N