Algodoo simulation software

neufneufneuf

I studied with one point for attraction for isolate the error. I drawn all forces, I must be wrong too because I see a torque. I gave 2 possible construction but it's not the same torque...I added point3.png where no torque. How physics can do for choose the good one ? Is friction change something ?

dlouth15

neufneufneuf wrote: »

I studied with one point for attraction for isolate the error. I drawn all forces, I must be wrong too because I see a torque. I gave 2 possible construction but it's not the same torque...I added point3.png where no torque. How physics can do for choose the good one ? Is friction change something ?

It is getting a bit confusing at this point. What I would suggest therefore is to start again with the simplest system you can think of to demonstrate the idea. I think you are going in this direction already. It is much easier to analyse 2 or 3 objects than a big pile of them.

Label everything.

So for example if the objects have mass, specify what that mass is e.g. 2 Kg, 3Kg. If there is gravity, indicate it and its direction. If there are attractive forces note them and any surfaces that have friction.

I think it is best to forget the Algodoo software for the moment as it appears to have limitations.

Don't draw in force vectors just yet but say what you think should happen to the objects themselves. Do you think they should move? Do you think they should rotate etc.

Stick with the one model until it is fully understood before moving to the next one.

Do this on a new thread. Then we can try and figure out what the physics says.

neufneufneuf

OK, I will start a new thread and explain more my images. I drawn a figure where if disk turn on left wall before meet the up wall, if there is friction the up wall give less force and the sum of forces is a torque on disk. Maybe it's the error Algodoo done.

dlouth15

neufneufneuf wrote: »

OK, I will start a new thread and explain more my images. I drawn a figure where if disk turn on left wall before meet the up wall, if there is friction the up wall give less force and the sum of forces is a torque on disk. Maybe it's the error Algodoo done.

I would ignore Algodoo for the moment. The problem I have with that diagram is that I assume N1 is a the normal force from one of the walls but it is drawn incorrectly. I will explain on the new thread. Leave out the forces initially on the new thread as we will draw them later.

neufneufneuf

I give new scene where energy reach 10000 J in 10 minutes. It's strange that the software give a so big error ! It's very linear.

neufneufneuf

It's very interesting because if rectangle attract disk: no rotation. But if disk attrack rectangle there is rotation ! I think the "add center axle" is with holes, and this is matter except where there is holes, this is the asymmetric function. Maybe it's for that the rotationnal speed is like a see-saw.