Question

With the increase in pressure, the exit velocity _________

(a) Decreases

(b) Increases

(c) Same

(d) Independent

This question was addressed to me in class test.

I'm obligated to ask this question of Area Velocity Relationship for Compressible Flow in chapter Compressible Flow of Fluid Mechanics

Answer 1

The correct choice is (a) Decreases

Easy explanation: Pressure is inversely proportional to the velocity. So, with the increase in pressure, the exit velocity decreases. We know that the pressure is equal to force per unit area, this contradicts the above statement.