Physics · 2017
JEE Main · 8 April 2017, Shift 1 · Q5
A uniform disc of radius R and mass M is free to rotate only about its axis. A string is wrapped over its rim and a body of mass m is tied to the…
A uniform disc of radius R and mass M is free to rotate only about its axis. A string is wrapped over its rim and a body of mass m is tied to the free end of the string as shown in the figure. The body is released from rest. Then the acceleration of the body is :
Official answer
(1)
$\displaystyle \frac{2 \mathrm{mg}}{2 \mathrm{~m}+\mathrm{M}}$
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JEE Main 2017 Physics question, with the answer from NTA’s final answer key. Where our answers come from.