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

PhysicsW.E.P.Work kinetic energy theoremEasy2 minPYQ_2020
PhysicsEasysingle choice

A block of massm=0.1 kgis released from a height of4 mon a curved smooth surface. On the horizontal surface, pathABis smooth and pathBCis rough with a coefficient of frictionμ=0.1. If the impact of the block with the vertical wall atCis perfectly elastic, the total distance covered by the block on the horizontal surface before coming to rest will be (takeg=10 m s-2)

Options:

Answer:
C
Solution:

TotalKEdissipated against friction=mgh=4 J

Work done against friction in one trip acrossBC=mgμ×2=0.2 J

Total number of trips acrossBC=40.2=20

Total distance=20×BC+19×AB=59 m

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Work kinetic energy theorem
2mℹ️ Source: PYQ_2020

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