Two ice skaters stand together as illustrated in Figure (a) below. They "push off and travel directly away from each other, the boy with a velocity of v0.360 m/s to the left. If the boy weighs 750 N and the girl weighs 491 N, what is the girl's velocity (in m/s) after they push off? (Consider the ice to be frictionless.) m/s (a) Before 0.50 m/s (b) After

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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?”