Three masses are connected to a table as shown in the figure. The table has a coefficient of kinetic friction of 0.350. The objects have mass of m1 = 4.00 kg, m2 = 1.00 kg, and m3 = 2.00 kg, and the pulleys have no friction. If the tension of the rope between masses m1 and m2 is T1; and the tension of the rope between the masses m2 and m3 is T2, determine the tension T2.

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”