A woman is standing on a steep hillside in the rain and is not moving. A sudden gust of wind blows down the hillside, which makes her worry that she might start sliding down the hill. However, the woman still does not slide. Which of the following statements explains why she does not slide down the hillside? A. The wind does not supply enough force to overcome the kinetic friction between the woman and the ground. B. The static friction between the woman and the ground increases as a result of the wind gust. C. The wind does not supply enough force to overcome the static friction between the woman and the ground. D. The kinetic friction between the woman and the ground increases as a result of the wind gust.

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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?”