Fluid Mechanics and SHM of spring

  • Thread starter nago
  • Start date
  • #1
2
0

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-10.05/0.1


I'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 :/ )
 
Last edited:

Answers and Replies

  • #2
1,198
5
You are going to have to provide a better problem statements than what you supplied. We are not mind readers here.
 
  • #3
2
0
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 Xm) which is Amplitude and ∅ which is the phase constant.
 
  • #4
1,198
5
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.
 
  • #5
1,198
5
With the SHM problem, how did you do it without knowing the spring constant value?
 
  • #6
3,812
92
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.
 

Related Threads on Fluid Mechanics and SHM of spring

Replies
1
Views
1K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
5
Views
1K
Replies
4
Views
4K
  • Last Post
Replies
19
Views
2K
  • Last Post
Replies
3
Views
6K
  • Last Post
Replies
19
Views
9K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
0
Views
2K
Top