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Which among the following is formula for force when it acts along the direction of flow?

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+2 votes
in Fluid Mechanics by (118k points)
Which among the following is formula for force when it acts along the direction of flow?

(a) pav^2Sin^2θ

(b) pav Sin^2θ

(c) pa Sin^2θ

(d) maE Sin^2θ

This question was posed to me in semester exam.

This key question is from Force Exerted by a Jet on a Stationary Flat Inclined Plate in portion Impact of Jets and Jet Propulsion of Fluid Mechanics

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Best answer
Right answer is (a) pav^2Sin^2θ

The explanation: When a force can be resolved into two components, one in the direction of the jet and the other perpendicular to the jet. The formula for force when it acts along the direction of flow is equal to pav^2 Sin^2θ.

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