Rotational Motion Question 133

Question: A uniform disc of mass M and radius R is mounted on an axle supported in frictionless bearings. A light cord is wrapped around the rim of the disc and a steady downward pull T is exerted on the cord. The angular acceleration of the disc is

Options:

A) TMR

B) MRT

C) 2TMR

D) MR2T

Show Answer

Answer:

Correct Answer: C

Solution:

[c]Torque exerted on the disc τ=TR

Now τ=Iα α=τI=TR12MR2 =2TRMR2=2TMR



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