Fluid Mechanics and SHM of spring

[nago]

Homework Statement

Fluid Mechanics problem: http://i.imgur.com/dlAO6.jpg

SHM of spring problem: http://i.imgur.com/7AOMR.jpg

Homework Equations

Fluid mechanic problem;
Bernoulli's principle A₁v₁=A₂v₂
v= velocity
A= cross sectional area
R= flow rate

SHM of spring problem;
x(t)=Acos(ωt+∅)

The Attempt at a Solution

For the Fluid problem I ended up with :
v = R/A₂ = 2R/A₁

For the SHM problem I ended up with:
A = 0.10
∅= cos^-10.05/0.1I'm having a problem with both of these problems and I'm not confident with my answers.
Any help would be greatly appreciated :)
(And sorry if I break any rule of the forums or such, It's only my first post :/ )

 

[LawrenceC]

You are going to have to provide a better problem statements than what you supplied. We are not mind readers here.

 

[nago]

You are going to have to provide a better problem statements than what you supplied. We are not mind readers here.

I'm sorry :/ These problems are actually made by my professor himself, but I'll try to explain.

In the first problem, water is flowing from the tank into a narrowing pipe, I'm supposed to get the velocity of the water when its in the narrow part of the pipe. It's related to Bernoulli's principle of fluid through a narrowing pipe.

For the second problem, It's a block of 0.5 kg displaced 5cm from its original position with an initial velocity of 10 m/s. I'm supposed to get A (or X_m) which is Amplitude and ∅ which is the phase constant.

 

[LawrenceC]

In the fluids problem, I think the teacher is looking for an expression for the velocity in terms of the height of the tank.

A1V1=A2V2 is just a form of the continuity equation which is a statement of conservation of mass for constant density. Bernoulli's principle is something else.

 

[LawrenceC]

With the SHM problem, how did you do it without knowing the spring constant value?

 

[Saitama]

With the SHM problem, how did you do it without knowing the spring constant value?

^This. I was wondering how you could solve without the spring constant.