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Mini-Quiz: Causes of Friction

by Ron Kurtus (revised 16 February 2008)

Take this Mini-Quiz to check your understanding of the lesson material.



1. What causes adhesion of two materials?

The tiny bumps make sliding motion more difficult

Water will stick to anything, increasing friction

Electromagnetic attraction when molecules are in close proximity

2. What effect does surface roughness have on friction?

It is the main reason for friction

It only has a small effect unless the roughness is extreme

It depends if the materials are solids or liquids

3. What is the major cause of friction when sliding a heavy box through mud?

Deformation or plowing friction

Molecular attraction of the mud to the box material

Kinetic or moving friction

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


Know why things happen


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Mini-Quiz: Causes of Friction




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