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The drag coefficient is directly proportional to the ___________

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+1 vote
in Fluid Mechanics by (118k points)
The drag coefficient is directly proportional to the ___________

(a) Drag force

(b) Mass density

(c) Area

(d) Flow speed

I got this question in an online interview.

I need to ask this question from Drag on a Sphere in section Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

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Best answer
The correct answer is (a) Drag force

Explanation: The drag coefficient is directly proportional to the drag force. In fluid dynamics, the drag coefficient has no dimensions. It is a dimensionless quantity. Drag coefficient is used to quantify the resistance of an object in a fluid environment.

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