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  • Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. Explain the principle on which it works.

Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. Explain the principle on which it works.

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When water comes out from the sprinkler, it applies the opposite force on the sprinkler. This can be understood: by the principle of momentum conservation or Newton’s third law. The opposite force on the sprinkler, makes it rotate in the opposite sense. We know, by Newton’s third law, the force applied by the sprinkler on the water will cause equal and opposite force on the sprinkler by the water.

 

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Gurleen Kaur

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