Physics-
General
Easy

Question

A thin rod of mass m and length lambda is hinged to a ceiling and it is free to rotate in a vertical plane. A particle of mass m, moving with speed v strikes it as shown in the figure and gets stick with the rod. The value of v , for which the rod becomes horizontal after collision is

  1. The value of v, for which rod becomes horizontal after collision is square root of fraction numerator 168 over denominator 9 end fraction g l end root    
  2. The value of v, for which rod becomes horizontal after collision is square root of fraction numerator 53 over denominator 3 end fraction g l end root    
  3. Angular momentum of (rod + particle) system will remain constant about hinge just before and after collision    
  4. Angular momentum of (rod + particle) system will remain same about centre of mass just before and after collision    

The correct answer is: The value of v, for which rod becomes horizontal after collision is square root of fraction numerator 168 over denominator 9 end fraction g l end root



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