Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.Conservative force & potential energyMedium2 minPYQ_2020
PhysicsMediumsingle choice

A block of massM=2 kgwith a semicircular track of radiusR=1.1 mrests on a horizontal frictionless surface. A uniform cylinder of radiusr=10 cmand massm=1.0 kgis released from rest from the top pointA. The cylinder slips on the semicircular frictionless track. The speed of the block when the cylinder reaches the bottom of the track atBisg=10 m s-2

Options:

Answer:
A
Solution:

Let the speed of the block bev. Then from conservation of momentum, the velocity of the cylinder will be2vin the opposite directionm=M2

Now from conservation of energy

mgh=12Mv2+12m2v2, h=R-r=1 m

sov=10 m s-1

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Conservative force & potential energy
2mℹ️ Source: PYQ_2020

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