• Support PF! Buy your school textbooks, materials and every day products Here!

Piston & Gas Law Problem

  • Thread starter bcjochim07
  • Start date
  • #1
374
0

Homework Statement


The closed cylinder in the figure has a tight-fitting but frictionless piston of mass M. The piston is in equilibrium when the left chamber has pressure p0 and length L0 while the spring on the right is compressed by delta L. The spring constant of the spring is k.

a)What is delta L in terms of p0, L0, A, M, and k?

b) Find an expression for the net force on the piston. Assume all motions of are slow enough for the gas to remain at the same temp.

Homework Equations





The Attempt at a Solution



a) I didn't include all of the variables, so it seems that this part is too simple. Here's what I did: F=pA

so the force of the gas on the piston = the force of the spring on the piston

p0A=kdeltaL
deltaL= p0A/k

b) p1v1=p2v2

p0(L0)(A) = p1(L0+x)(A)

p1= p0L0/(L0 + x)

So the force is pA = Ap0L0/(L0+x) is this right?
 

Answers and Replies

  • #2
374
0
apistonpressure.jpg here's the figure
 

Related Threads for: Piston & Gas Law Problem

  • Last Post
Replies
8
Views
6K
  • Last Post
Replies
1
Views
568
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
793
  • Last Post
Replies
17
Views
1K
Top