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Question: Answered & Verified by Expert

A metre stick swinging in a vertical plane about a fixed horizontal axis passing through its one end undergoes small oscillation of frequency f0. If the bottom half of the stick is cut off, then its new frequency of small oscillation would become :

           

PhysicsOscillationsNEET
Options:
  • A f0
     
  • B 2 f0
  • C 2f0
     
     
  • D 22 f0
Solution:
1720 Upvotes Verified Answer
The correct answer is: 2 f0
f0=12πmglI

where l is the distance between the point of suspension and centre of mass of the body.

f0=12πm.g.L2mL2/3=12π3g2L

when the bottom half of the stick is cut off

f0'=12πm2.g.L4m2L/223=12π×3gL=2 f0

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