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A block is projected with speed 20m/s on a rough horizontal surface. The coefficient of friction between the surface varies with time as shown in figure. The speed of body at the end of 4 second will be A block is projected with speed 20m/s on a rough horizontal surface. The coefficient of friction between the surface varies with time as shown in figure. The speed of body at the end of 4 second will be
Dear student,Area under thecurve multiplied bywill give the change in momentum in that time.HenceHence final speed=
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