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A disc is in rotation with angular speed ω. If a child sits on it, what is conserved –
  • a)
    Linear medium
  • b)
    Angular momentum
  • c)
    Kinetic energy
  • d)
    Potential energy
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A disc is in rotation with angular speed ω. If a child sits on i...
When child sits on the rotating disc, his weight acts downwards and does not produce any torque. Hence the angular momentum of the system is conserved.
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Most Upvoted Answer
A disc is in rotation with angular speed ω. If a child sits on i...
And angular acceleration . If the angular speed of the disc is doubled, what happens to the angular acceleration?
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A disc is in rotation with angular speed ω. If a child sits on it, what is conserved –a)Linear mediumb)Angular momentumc)Kinetic energyd)Potential energyCorrect answer is option 'B'. Can you explain this answer?
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