Published by:
CGP EDU Academic Team
Published on: September 11, 2026
A uniform disc of mass 2kg and radius 1m is mounted on an axle supported on fixed frictionless bearings. A light chord is wrapped around the rim of the disc and mass of 1kg is tied to the free end. If it is released from rest-
Correct Matrix Matching
Text Solution
Verified by ExpertsThe correct answer is:
(i) By FBD of disc TR ; (ii) By eq; (i) and ; (ii) a
(a, b, c, d)
By FBD of particle
mg – T = ma
10–T = a ... (i)
By FBD of disc
TR = I ∝ = L 
⇒ T= 
T = Ma/2 = a …. (ii)
By eq. (i) and (ii)
a = 5 m/s 2 and T = 5N and ∝ = a/R = 5 rad/s 2 For angular displacement of disc :
θ = ω t + 1/2 ∝ t
2
Work done by torque
= 
Δ K.E. = Δ w = 200 J
K 2 – K 1 = 200 J
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