Fluid Mechanics - Linear Momentum

[EmmaJ]

I know the equation for conservation of linear momentum, and Bernoulli's equation:

So I've tried using Bernoulli's equation to find V1, then use the continuity principle to find V2, but then I get stuck on the mass flow rate.

I tried a different approach by trying to convert mass flow rate and velocity into variables I know, such as density, A1 and A2 but I think really I'm just stuck in correctly identifying the external (body) forces on the fluid and the surface forces on the fluid.

Many thanks for any help offered!

Emma

 

[Aphex]

I'm stuck on this very same question... any help?

 

[EmmaJ]

You go to UNSW? Still haven't worked it out...I'll just hope it's not in the final!

 

[Aphex]

Ha ha yeah i do. I'm thinking this question is a bit too nasty for an exam