John and Leah want to move the piano in their living room. John pushes from behind the piano with a force of 300 N, and Leah pulls on a rope tied to the front with a force of 100 N. The piano has a mass of 200 kg, and the friction force of the floor and the piano is 140 N. Calculate the acceleration of the piano. Round your answer to the nearest tenth. s2

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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?”