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 A long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod. The rod is set in angular motion about A with constant angular acceleration α. If the coefficient of friction between the rod and the bead is μ and gravity is neglected, then the time after which the bead starts slipping is
  • a)
  • b)
  • c)
  • d)
    Infinitesimal
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A long horizontal rod has a bead which can slide along its length and ...
Bead starts moving when the centripetal force is equal to the friction.
Hence, friction F = μmat [here gravity is neglected] 
where, at is tangential acceleration, it will be given by
at = v/t, where v is the linear speed = Lω. 
Hence, 
Also, centripetal farce = mLω2 
Hence 
i.e., 
This gives 
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A long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod. The rod is set in angular motion about A with constant angular acceleration α. If the coefficient of friction between the rod and the bead is μ and gravity is neglected, then the time after which the bead starts slipping isa)b)c)d)InfinitesimalCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod. The rod is set in angular motion about A with constant angular acceleration α. If the coefficient of friction between the rod and the bead is μ and gravity is neglected, then the time after which the bead starts slipping isa)b)c)d)InfinitesimalCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod. The rod is set in angular motion about A with constant angular acceleration α. If the coefficient of friction between the rod and the bead is μ and gravity is neglected, then the time after which the bead starts slipping isa)b)c)d)InfinitesimalCorrect answer is option 'A'. Can you explain this answer?.
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