112. CONCEPT QUESTIONS a. Yes. Since there is only one force acting on the man in the horizontal direction, it is the net force. According to Newton’s second law, Equation 4.1, the man must accelerate under the action of this force. The factors that determine this acceleration are (1) the magnitude and (2) the direction of the force exerted on the man, and (3) the mass of the man. b. Yes. When the woman exerts a force on the man, the man exerts a force of equal magnitude, but opposite direction, on the woman (Newton’s third law).
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