SSC JE Mechanical Engineering 2014 Set 2 Paper

Question : 177 of 200

Marks: +1, -0

A fan rotates at a constant speed of 60 rpm. The total angular displacement it makes in 10 sec is :

Solution:

Given N = 60 rpm
time t = 10 sec
angular displacement θ = ?
∵

θ=w.t={2πN}/60×t

={2×π×60}/60×10=20π

rad

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