The frictional force in this case depends on the two types of materials interacting (described by the coefficient μk) and how hard these two surfaces are pushed together (the normal force).

The maximum magnitude of the static frictional force depends on how much these two surfaces are pushed together (this is the normal force, N) and the types of materials interaction (wood vs. steel ...

The lateral force measurement was obtained immediately after each normal force measurement over the same locations. However, a given lateral force measurement was repeated 10 times on a single ...