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PhysicsElasticityMiscellaneousMedium2 minPYQ_2021
PhysicsMediumsingle choice

Two blocks of masses 3 kg and 5 kg are connected by a metal wire going over a smooth pulley. The breaking stress of the metal is 24π×102 N m-2. What is the minimum radius of the wire ?
( take g=10 m s-2

Question diagram: Two blocks of masses 3 kg and 5 kg are connected by a metal

Options:

Answer:
D
Solution:

Tension in the string =2m1m2m1+m2g

=2×3×5×108=752

Stress =TA

24π×102=752πr2

r2=7548×10-2

r2=0.015625

r=0.125 m=12.5 cm

Stream:JEESubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous
2mℹ️ Source: PYQ_2021

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