An object of mass 0.5 kg is placed on a rough surface with a coefficient of roughness of 0.2. The object is pulled up an inclined plane as far as 5 meters, determine the smallest force to be able to pull an object as high as 4 meters

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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?”