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NEET 2003 (AIPMT) · Rolling Motion

Rolling Motion question from NEET 2003 (AIPMT)

Q86NEET 2003 · AIPMTEasy

Rolling Motion

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is the speed of its centre of mass when the cylinder reaches its bottom?

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Answer: (c)

  1. Mgh=12Mv2(1+k2R2)Mgh = \frac{1}{2}Mv^2\left(1 + \frac{k^2}{R^2}\right)
  2. Solid cylinder: k2R2=12\frac{k^2}{R^2} = \frac{1}{2}, so Mgh=34Mv2Mgh = \frac{3}{4}Mv^2
  3. v=43ghv = \sqrt{\frac{4}{3}gh}
  4. So the answer is (c) 43gh\sqrt{\frac{4}{3}gh}.
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