Question

Can frictional force between two surfaces in contact be infinite?

Answer 1

I think no, because the frictional force depends on the pressure exerted by an object on a plane, and there are not force fields whose intensity is infinite

Answer 2

No. The frictional force between two surfaces is defined as follows:\[F _{f}=\mu F _{N}\]where Ff is the friction force, μ is the coefficient of friction, and FN is the normal force. The coefficient of friction has to be finite; therefore to have an infinite friction force the normal force would have to be infinite.