How does drum role
Classical Mechanics
Level
2
A cylinder is rolling down the a inclined plane(microscopic friction considered). Will friction be opposing the motion or supporting it?
neither suppose or oppose
supporting
opposing
N.O.T
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1 solution
Friction is an approximation of the millions of microscopic contact forces opposing an object's motion. Since the cylinder is rolling down the plane, the cylinder's motion is actually backwards at the points of contact, so friction is what pushes the cylinder forward.