A ceiling fan has a diameter (of the circle through the outer edges of the three blades) of 120 cm and rpm 1500 at full speed. Consider a particle of mass 1g sticking at the outer end of a blade. What is the net force on it, when the fan runs at full speed? Who exerts this force on the particle? How much force does the particle exert on the blade in the plane of motion?
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
= 14.8N, 
= 14.8 N.
Sol. ω = 2 π n = 
rad/sec
r = 
= 60 cm = 0.6 m
m = 1 g = 10 – 3 kg
F = m ω 2 r = 10 – 3 × 
× 0.6
= 
= 14.8 Ans.
This force is exerted by blade of fan and equal force is exerted by particle on blade in same magnitude but opposite in direction.
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