Q.37. The value of m so that elongation in both the identical massless rods are same is


(1) m = M 2
(2) m = M 3
(3) m = 0
(4) m = M

Dear student

Regards
 

  • -3
let the force in rod 1 and 2 be F1 and F2
and elongation in a rod is given by FL/AY
since elongation is same so therefore
F1 = F2
now, F2 = Mg 
and F1 = F2 + mg  
so if F1 = F2 then mg = 0
implies m=0
 
  • -2
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