Browse Search Popular Register Upload Rules User list Login:
Search:
Coefficient of Friction Tester

Image:
screenshot of the scene

Author: s_noonan

Group: Technical

Filesize: 9.11 kB

Date added: 2013-06-01

Rating: 5

Downloads: 534

Views: 435

Comments: 8

Ratings: 1

Times favored: 0

Made with: Algodoo v2.1.0

Tags:

Scene tag
Mechanism automatically determines the coefficient of friction between the block and tray. It works by tilting the tray until the block just starts to slide. The coefficient of friction then equals the tangent of the tray angle.

If the coefficient of friction of the tray and block differ, then Algodoo uses a special formula to determine the combined coefficient of friction. I figured out what that equation is. If you think you know, then post your guess below. The winner will get an all expense paid trip to anywhere in the world, so be sure to list your desired destination with your guess.
Last edited at 2016/07/02 20:48:10 by s_noonan
Please log in to rate this scene
edit
Similar scenes
Title: Inclined Plane to Flat Friction
Rating: 5
Filesize: 48.47 kB
Downloads: 424
Comments: 3
Ratings: 1
Date added: 2017/04/08 17:27:35
Made with: Algodoo v2.1.0
screenshot of the scene
Inclined Plane to Flat Friction
Rating: rated 5
download
Title: Physics Experiment Simulation
Rating: 5
Filesize: 191.37 kB
Downloads: 387
Comments: 0
Ratings: 1
Date added: 2020/03/25 11:43:56
Made with: Algodoo v2.1.0
screenshot of the scene
Physics Experiment Simulation
Rating: rated 5
download
Title: Three Legged Stool
Rating: 5.625
Filesize: 117.43 kB
Downloads: 2706
Comments: 3
Ratings: 2
Date added: 2018/11/14 23:11:44
Made with: Algodoo v2.1.0
screenshot of the scene
Three Legged Stool
Rating: rated 5.6
download
Title: Physics Extra Credit
Rating: 5
Filesize: 0.53 MB
Downloads: 287
Comments: 0
Ratings: 1
Date added: 2014/01/02 14:20:36
Made with: Algodoo before v1.8.5
screenshot of the scene
Physics Extra Credit
Rating: rated 5
download
Title: Friction iPadVer 2.1
Rating: 5.375
Filesize: 39.21 kB
Downloads: 495
Comments: 1
Ratings: 2
Date added: 2020/05/28 07:20:13
Made with: Algodoo v2.1.0
screenshot of the scene
Friction iPadVer 2.1
Rating: rated 5.4
download
Title: Friction v2.2
Rating: 5
Filesize: 42.07 kB
Downloads: 344
Comments: 0
Ratings: 1
Date added: 2020/05/28 06:28:28
Made with: Algodoo v2.1.0
screenshot of the scene
Friction v2.2
Rating: rated 5
download
Xray
2013/06/01 04:11:24
tan{theta} = µs
Theta is the angle from vertical and µs is the static coefficient of friction between the objects.

England looks like a fun place to visit.
s_noonan
2013/06/01 11:41:04
You may have not understood the question. The question is:

How does Algodoo calculate the coefficient of friction when the coefficient of one material is different from the other?

For example, if the block has µ = 0.123 and the tray has µ = 0.456, then how does Algodoo calculate the combined COF (0.237)?

Also, in your statement above, theta should be the angle from the horizontal, not vertical.
Last edited at 2013/06/04 08:16:27 by s_noonan
Xray
2013/06/01 17:33:44
"You may have not understood the question."

Damn! My wife says that to me every day! :lol:

I'll have to do some digging to find the answer you are looking for.
Last edited at 2013/06/01 17:38:02 by Xray
Xray
2013/06/02 01:00:37
Well, I had to clean out a few cobwebs in my memory bank to find it, but if memory serves me, you find the coefficient of friction between two surfaces where one of the surfaces is a ramp, by dividing the height of the ramp by its length at the point where the object just begins to slide. So, the equation would simply be Cf = h/l. I don't know if that's how Algodoo calculates it, but that is one way to do it. Did I get this right or did I totally miss the boat again?
s_noonan
2013/06/02 11:58:48
I think you totally missed the boat. Your latest statement is equivalent to your first statement. Although both statements are true, I don't believe either answers the question. I would think the formula would be in the form of:

u = f(u1,u2)

where

u = combined coefficient of friction
u1 = COF of one material
u2 = COF of other material
Xray
2013/06/02 17:00:55
Oy Vey! I give up! :lol:
s_noonan
2013/06/04 08:21:19
I figured that nobody would get it. That is why I offered such a large prize. I'll end the contest now, just in case somebody does figure it out.
s_noonan
2014/11/22 15:06:46
u = (u1 * u2)^0.5