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  4. Figure here shows the frictional force versus displacement for a particle in motion. The loss of kinetic energy in travelling over S = 0 to 20 m will be

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Q. Figure here shows the frictional force versus displacement for a particle in motion. The loss of kinetic energy in travelling over $S = 0$ to $20 \,m$ will bePhysics Question Image

Work, Energy and Power

Solution:

Work done by friction = Area under the F vs 5 graph Each square is $25 J$, effectively there are 10 squares in the area. Hence loss in K.E.= Workdone by friction $= 250 J$.