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A box of mass m1 = 1 kg rests on top of a second box of mass m2 = 5kg. The coefficient of kinetic friction between each other and between the second box and the floor is 0.2 . A rope is attached to the bottom mass. Find the force necessary to pull the boxes at a constant speed of 2 m/s.

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Answer #1

constant speed so acceleration is zero

\muk = 0.2

m1 = 1 kg

force F = \mukm1g = 0.2*1*9.8

F = 1.96 N

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