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NEET 2002
Exam
NEET
Year
2002
Subject
Physics
Chapter
Rotational Motion

NEET 2002 · Physics · Rotational Motion

A disc is rotating with angular speed ω . If a child sits on it,...

A disc is rotating with angular speed ω\omega. If a child sits on it, what is conserved?

Options

  1. ALinear momentum
  2. BAngular momentum
  3. CKinetic energy
  4. DPotential energy

Correct answer

B. Angular momentum

Step-by-step solution

τ=dLdt\tau=\frac{d L}{d t}, so =0⇒L=dLdl=0 \Rightarrow L=\frac{d L}{d l} constant Law of conservation of angular momentum.
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