Problem 8: The free-body diagram shows the all of the forces acting on an object of mass m = 4.13 kg. The three forces have magnitudes F1 = 12.3 N, F2 = 22.1 N, and F3 = 15.5 N, with directions as indicted in the diagram, where 0 = 27.8 degrees. F2 Part (a) Write an expression for the x-component of the acceleration in terms of the symbols in the problem statement. ax = cos(4) cos(0) 7 8. 9 HOME cos(a)

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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?”