New Sim Request: Force Table

[IkeEisenhauer]

Commonly used physics/engineering lab is a force table. A simulated version of this lab would be quite popular since they are ubiquitous in those two majors.

The general idea is to simulate the placement of weights on pulleys (adjustable along the circumference of a given circular table parallel to the ground) to reflect given forces, usually a set of 2-D forces acting on a common point (a small disc that the threads are attached too, that are not in equilibrium are presented and the user is expected to determine and set the equilibrant force required to bring the system into equilbrium.

Once that force is placed a pin to release the free floating disc is pulled and if the student has correctly placed the equilibrant force the disc stays stationary, if not then the disc proceeds to follow Newton's law and accelerates in the reaction force direction accordingly.

[brtymn]

Hello! Would you like to work on this simulation @IkeEisenhauer ? One of us can work with you as well!

[IkeEisenhauer]

I am willing to be a requirements resource and attempt to help technically, however I have limited capcity to be a major technical contributor at this time. But willing to make progress if and when I can.

On Sat., Aug. 8, 2020, 2:41 a.m. Bartu Yaman, notifications@github.com wrote:

Hello! Would you like to work on this simulation @IkeEisenhauer https://github.com/IkeEisenhauer ? One of us can work with you as well!

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/ThePhysHub/ThePhysicsHub/issues/3#issuecomment-670851639, or unsubscribe https://github.com/notifications/unsubscribe-auth/AFY5GTOZLLQOSSAX2IANCNLR7UMWJANCNFSM4PYOLCMA .

[brtymn]

We have one of the team members working on the project right now! We will keep you updated!

[justusmattern]

@IkeEisenhauer Hey, the first version of our force table is on our website physicshub.herokuapp.com! I focused on visualizing the vectors that then add up to the resulting force. In the next days, I'll add the feature of manually typing the angles instead of setting them with a slider.

Note that this is not the final version of the simulation. Feel free to make suggestions and propose ideas for additional features! And let me know what you think about the simulation so far ;)

Greetings, Justus

[IkeEisenhauer]

Excellent start, here are few comments, not sure if there is another place you want me to enter these:

Bugs:

• A circle has 2pi radians, not 2
• Strongly suggest using degrees rather than radians for entry, more intuitive for the expected user
• Units on mass, kg?
• When the disk moves, it should be attached to the "Strings" as it moves ..it is actually attempting to seek an equilibrium

Suggestion features:

• Ability to manipulate placements of weights on the force table itself by dragging the weights around the circumference as an alternative to entering the angular locations, this is what is actually done in the real force table.
• See the lines of direction [disk to weight strings] prior to releasing the disk. To emphasize the vector placement.
• Color the placed vectors, and color the resultant vector (if one exists other than <0,0>) differently.

This is very good start, looking forward to seeing it progress.

[justusmattern]

@IkeEisenhauer Thanks for your feedback! All of those suggestions are pretty easy to implement, it shouldn't take too long.

"See the lines of direction [disk to weight strings] prior to releasing the disk. To emphasize the vector placement" - just to clarify, do you mean that the vectors should be displayed immediately or just the strings?

[IkeEisenhauer]

I mean the strings [which are geometrically the directional lines of action for the vectors] should be shown upon placement of the weights.

On Wed, Aug 12, 2020 at 10:26 AM justusmattern notifications@github.com wrote:

@IkeEisenhauer https://github.com/IkeEisenhauer Thanks for your feedback! All of those suggestions are pretty easy to implement, it shouldn't take too long.

"See the lines of direction [disk to weight strings] prior to releasing the disk. To emphasize the vector placement" - just to clarify, do you mean that the vectors should be displayed immediately or just the strings?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/ThePhysHub/ThePhysicsHub/issues/3#issuecomment-673007958, or unsubscribe https://github.com/notifications/unsubscribe-auth/AFY5GTOBYR4NPRAWKWIL2XTSALGC7ANCNFSM4PYOLCMA .

-- William "Ike" Eisenhauer Pronouns: one/ones Adjunct - Mechanical and Materials Engineering Senior Capstone Coordinator Portland State University EB 403 503-496-2634 Book Online Appointment https://qxuicutqazjqbnwopo.10to8.com/

[justusmattern]

Hi there @IkeEisenhauer! I implemented your suggestions, feel free to let us know what you think of it!

[IkeEisenhauer]

Most excellent, this is usable as is for my class. Much appreciated. I will put together some other suggestions later, but this is a good job.