Question

Ques-1 Explain why is it difficult for a Fireman to hold a hose which effect large amount of water at a high velocity??

Answer 1

Answer:

Explanation:

When a fireman holds a hose, which is ejecting large amounts of water at a high velocity, then a reaction force is exerted on him by the ejecting water in the backward direction. This is because of Newton’s third law of motion. As a result of the backward force, the stability of the fireman

decreases. Hence, it is difficult for him to remain stable while holding the hose.

Answer 2

We can explain the above observation on the basis of Law of conservation of momentum and Newton's Third Law of Motion. When the system of hose and water is not ejecting any water, its momentum is zero. When the water issues out from the hose with a high velocity, it has momentum in the forward direction.

Therefore, in order to conserve momentum, the hose tends to move in the backward direction and hence is difficult to hold, or The ejection of large amounts of water at a high velocity from a hosepipe results in the development of an equal force of reaction on the hosepipe in the backward direction. That is why it becomes difficult for the fireman to hold the hosepipe.

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