Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
According to an old book on electrostatics the coefficient of
kinetic friction is not always proportional to the load, N. For
Al on steel f=mu*N for any N (mu=1.2). But for Cu on Cu this
is true only when the load is due to at least 100 grams (mu=1.8).
Below this: mu=0.4 at 0.1 grams, 0.7 at 1 gram and 1.5 at 10 grams.
Reading from the graph (a lot of data points and a smooth line )