Solve problem No. 7 if the coefficient of friction between the box and the surface is 0.10. What is the resulting acceleration of the box? ______________ How fast is the box moving after 1 second? _______________ How far has it moved after 1 second? ____________________

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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?”