An Atomic Force Microscope consists of a cantilever with a very fine tip on one end.The lever is driven by a piezoelectric motor allowing the tip to scan a surface on an atomic scale.As it scans the surface what is the main frictional force between the tip and the surface?
A)static
B)kinetic
C)rolling
D)all three
E)there is no frictional force

Question

Quizplus · Accepted Answer

The main frictional force between the tip of an Atomic Force Microscope (AFM) and the surface it scans is kinetic friction. This is because the tip is in motion relative to the surface, leading to resistance that is characterized as kinetic friction. Static friction would be relevant if the tip were not moving relative to the surface, and rolling friction is not applicable since the tip does not roll over the surface but rather scans across it.

An Atomic Force Microscope Consists of a Cantilever with a Very