Questions
A long metallic string of mass m, length , cross –sectional area A and Young’s modulus Y is suspended from one end A. A small object of mass 2m is attached to its lower end B. Then elongation produced in the string is
detailed solution
Correct option is A
δ = mg.l2A−γ+2mg.lAy = 52.mglAyTalk to our academic expert!
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A wire elongates by / mm when a load Wis hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm):
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