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Coefficients of Friction

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Presentation on theme: "Coefficients of Friction"— Presentation transcript:

1 Coefficients of Friction
Static vs. Kinetic

2 Coefficient of Static Friction=μs
The force that opposes the start of motion between two objects in contact with one another. Coefficient of Static Friction=μs Ff = μs x Fn If the applied force cannot overcome the static frictional force…the object doesn’t move

3 Coefficient of Kinetic Friction=μk
The force that is exerted on one surface by another when the surfaces are in motion. Coefficient of Kinetic Friction=μk Ff = μk x Fn Kinetic friction is NOT as great as static friction (easier to overcome) Once moving, a force must still be applied or the object will stop moving.

4 Examples of Friction Very small amounts of friction Static Friction Demo Static Friction Video

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