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Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

  Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

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This can be explained with the help of Newton's third law of motion (action-reaction pair). When the velocity of water is more i.e., water is coming out with higher force thus the reaction force on the hose is also large. This makes it difficult for a fireman to hold the hose.  

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