Quote:
Originally Posted by Ether
Yes.
But according to the Coulomb friction model, the total friction force must be mu_k*W.
So that means tau_k must equal mu_k*W*r*sinθ.
So, what happens if the voltage to the motor is increased?
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This doesn't sound right to me. The torque applied by the motor should not be changing as theta changes. I think the problem is that in order to find the friction equal to tau_k/(r*sin(theta)), you must assume the wheel is gripping. This does make sense because it is able to rotate and drive around the pivot but is inconsistent. I feel like one of the boundary conditions is actually overconstraining the model.
A pole is usually made of aluminum or steel pipe. You can get these wherever you get metal. :)
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