The diagram belows represents a free body diagram for an object that is moving to the right. Which arrow closely approximates the direciton of particles accleration?

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A: The saturated vapour pressure of water is SVP = 4.24×103 Pa.

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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?”