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The relative velocity is obtained by the equation_________

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+1 vote
in Fluid Mechanics by (118k points)
The relative velocity is obtained by the equation_________

(a) u – V1

(b) V1

(c) u*V1

(d) u/V1

This question was addressed to me in class test.

Enquiry is from Force Exerted by a Jet on a Series of Vanes topic in division Impact of Jets and Jet Propulsion of Fluid Mechanics

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by (362k points)
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Best answer
Right option is (a) u – V1

Easiest explanation: The relative velocity of the jet is denoted as Vr1. It is the relative velocity at the inlet to the vane. Relative velocity of inlet to the vane is obtained by subtracting vectorially the velocity of the vane with its absolute velocity.

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