Concept explainers
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?
The tension on the rope tied to the tree when pulled by one horse and then pulled by two horses.
Explanation of Solution
Introduction:
Newton’s third law states that to every action there is always an equal and opposite reaction. A tension in a rope when it is pulled is an example of Newton’s third law.
When one horse on either side pulls the strongman (T), he pulls them with the same force (T). Hence, the tension created in the rope is T according to Newton’ third law.
When one horse pulls the strongman (let it be T), he pulls the tree with the same force (T) thereby creating a tension in the rope of equal magnitude (T). When two horses pull the strongman (2T), he pulls the tree with the same force(2T) thereby creating a tension in the rope of equal magnitude(2T).
Conclusion:
When one horse on either side pulls the strongman (T) he pulls them with the same force (T). Hence, the tension created in the rope is T according to Newton’ third law.
When one horse pulls the strongman (let it be T), he pulls the tree with the same force (T) thereby creating a tension in the rope of equal magnitude (T). When two horses pull the strongman (2T), he pulls the tree with the same force(2T) thereby creating a tension in the rope of equal magnitude(2T).
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