A 900 kg car is pulling a 275 kg trailer. Together, the car and trailer have an acceleration of 2.21 m/s2 in the forward direction. Neglecting frictional forces on the trailer, determine the following. (Indicate the direction with the sign of your answer. Take the forward direction to be positive.) (c) the force exerted by the trailer on the car (d) the resultant force exerted by the car on the road

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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?”