Is F in P=F/A an average or a sum of all microscopic forces?

  • #1
11
0
Hello,
I've read that the force F we use in the pressure formula P=F/A is an average of all microscopic forces exerted by the gas on the wall of the container over a period of time. Is it true? I thought it was a SUM rather than an average?
I assume that in that definition the microscopic force is a force exerted by a SINGLE particle on the wall.
 

Answers and Replies

  • #2
Matterwave
Science Advisor
Gold Member
3,966
327
It's a sum over all the different particles, but an average over time. When the text talks about averaging, it should be talking about averaging over time to smooth out the random fluctuations of collisions with particles.
 
  • Like
Likes Greg777

Related Threads on Is F in P=F/A an average or a sum of all microscopic forces?

Replies
9
Views
10K
Replies
1
Views
2K
Replies
41
Views
4K
  • Last Post
Replies
8
Views
2K
Replies
7
Views
1K
Replies
9
Views
6K
Replies
6
Views
3K
Replies
16
Views
975
Replies
6
Views
8K
Replies
9
Views
612
Top