Kinetic Friction

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7 Terms

1
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Kinetic friction occurs when

two surfaces in contact move relative to each other. 

2
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Friction force directly proportional to

 coefficient of friction and normal force Ffk  = μfkFn

3
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The kinetic friction force is exerted in a direction opposite to

the motion of each surface relative to the other surface.

4
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The coefficient of friction μ

not a force and has no unit

5
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The coefficient of friction is a number that tells

how ‘sticky/rough’ two surfaces are

6
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The force of friction between two surfaces does not depend on

the size of the surface area of contact.

7
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The coefficient of kinetic friction depends on

the material properties of the surfaces that are in contact.