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(B) Let the force exerted by the team of $2$ horses be $F$. In the first case,one end of the rope is tied to a tree and the other is pulled by $2$ hor

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remain the same

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(B) Let the force exerted by the team of $2$ horses be $F$. In the first case,one end of the rope is tied to a tree and the other is pulled by $2$ horses with force $F$. The tree exerts an equal and opposite reaction force $F$ on the rope according to Newton's third law. Thus,the tension in the rope is $T = F$. In the second case,the rope is pulled by two teams of $2$ horses each,pulling in opposite directions with force $F$. For the rope to be in equilibrium,the tension $T$ at any point in the rope must balance the applied force. Since each team pulls with force $F$,the tension in the rope remains $T = F$. Therefore,the tension in the rope remains the same.

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