Question

Explain why
A fluid flowing out of a small hole in a vessel results in a backward thrust on the vessel.
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Answer 1

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Solution : Due to small area of cross-section of the hole, fluid flows out of the vessel with a large speed and thus the fluid possesess a large linear momentum. As no external force acts on the system, in order to conserve linear momentum, the vessel acquires a velocity in backward thrust result on the vessel.