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JEECUP (UP Polytechnic) Yo Yo — practice questions

Explore 1 free Yo Yo questions in JEECUP (UP Polytechnic) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Yo Yo questions and exercises with answers

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A **yo-yo** (solid uniform cylinder) of mass $M$, radius $R$ unwinds under gravity. Its downward acceleration is:Read the answer and worked solution →

Worked practice questions

A **yo-yo** (solid uniform cylinder) of mass $M$, radius $R$ unwinds under gravity. Its downward acceleration is:

  1. $g$
  2. $g/2$
  3. $2g/3$
  4. $g/3$
Show answer and solution

Correct answer: C. $2g/3$

**Newton:** $Mg - T = Ma$. **Torque about CM:** $TR = I\alpha = (MR^2/2)(a/R)$ ⇒ $T = Ma/2$. **Sub:** $Mg - Ma/2 = Ma$ ⇒ $a = 2g/3$. Tension $T = Mg/3$.

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