Questions
A block of mass m is tied to one end of a string of length l, young's modulus Y and cross-sectional area A. The block is made to rotate in a horizontal circle of radius l with angular velocity in a gravity free space. If elongation of the wire is x, then elastic potential energy stored in the wire is
detailed solution
Correct option is A
Centrifugal force acting on the block, F=mω2l.∴ Elongation = x∴ Elastic potential energy =12F.x=mω2lx2Talk to our academic expert!
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