The strong man can withstand the tension force exerted by the two horses pulling in opposite directions. How would the tension compare if only one horse pulled and the left rope were tied to a tree? How would the tension compare if the two horses pulled in the same direction, with the left rope tied to the tree?
Solution Introduction We have to find out the tension of the rope in all three conditions. Solution Step 1 Let us consider that each horse can apply F force. In the first case the horse in the right side will apply F force towards right and the horse at the left applying the same amount of force towards left. Hence the total tension in the rope is T = F Step 2 In this case the horse is applying the force F to the man towards the right. So the man will apply the same amount of force to the tree. Because of the newton’s third law the, the tree will also apply same amount of force to the man. Hence, in this case also there will be two force of magnitude F will be acting on the person. Hence the tension will be T = F So in this case the tension same as compared to the case when the man was pulled by two horses from two side.