Thu September 08, 2011 By:

Explain Why is it difficult for a fireman to hold a hose which ejects a large amount of water at high velocity

Expert Reply
Thu September 08, 2011
The water exiting the hose is being pushed forward by the water behind it in the hose, 
so it pushes back on that water (and the hose). Since it is a large mass of water being 
ejected at a high speed, the impulse it feels is large and forward, and the water then 
provides a large impulse back on the hose, which makes it hard to hold
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