more on friction

keep in mind that Mu static is much higher than mu kinetic, so when experimenting try and push the assembly to when it just about moves, and make sure that the robot’s drive assembly can exert that force, also the ramp could be interesting when the normal force also contributes to the friction, really straining your robot, and make sure that if the robot does stop on the ramp, that it can get moving again. there would be nothing more sad than a robot that makes it half way up, stops and rolls back down and has to try it again.

friction in this case is also dependent on how much carpet physically comes in contact with the wheel, the ridges in the wheel will cold fuse to the carpet, creating what we call friction, so the more reactive material in direct contact should effect performance, but my knowledge there is a bit shaky, so I’ll bug my physics teacher to add another post.