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UPSC Civil Service Exam Questions

Q1:
The rotation of a rigid body is governed by What is its angular velocity at t - 2s ?

A 18 rad/s

B π/4 rad /s

C π/8 rad /s

D zero.

ANS:B - π/4 rad /s

D is the correct answer.

Angular velocity = d@/dt = 2. 5 π/4 * (cost π/4).
Cos 3π/2 = 0.



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