How is the coef of friction affected when we are dealing with high speed sliding and we compare it to low speed experimentally determined coefs of friction? I know it should decrease, but is the difference between both values negligible or enough to change the whole problem? Also at high speeds...
I'm modeling a safety brake for an elevator and is kind of difficult to measure the coefficient in such a thight area. The rail contains brown rust and the approximate load applied by the brakes would be 10,000 lbs. I have search a couple of approximations but I don't know how much does the rust...
