Handwritten Solution pic.....Plz.

1.	Handwritten Solution pic.....Plz.
Answer» e graph we can clearly see thatFrom the graph we can clearly see thatacceleration BECAME constant(4.9m/s^2) at t=10sat this acceleration,there might be slipping between the block A and Bso,in that caseu×N=m×a.....(u=coeeficient of Kinetic FRICTION)u×mg=m×au=a/gu=4.9/10=.49=.5(APPROX)so,OPTION1) is the correct answerso,option1) is the correct answer{hope it HELPS}

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