JEE Main 2022 — Rotational Motion Question with Solution
From: JEE Main 2022 (Online) 28th June Evening Shift
Question
A uniform disc with mass M = 4 kg and radius R = 10 cm is mounted on a fixed horizontal axle as shown in figure. A block with mass m = 2 kg hangs from a massless cord that is wrapped around the rim of the disc. During the fall of the block, the cord does not slip and there is no friction at the axle. The tension in the cord is ____________ N.
(Take g = 10 ms2)
This question includes a diagram. The text above accompanies the figure.
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Show full solutionCorrect answer: 10
Step-by-step explanation
20 T = 2a
and 0.1 T = 0.02 =
T = 2a
a = 5 m/sec2
So T = 10 N
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