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Coefficients of Friction Static vs. Kinetic. Static Friction The force that opposes the start of motion between two objects in contact with one another.

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Presentation on theme: "Coefficients of Friction Static vs. Kinetic. Static Friction The force that opposes the start of motion between two objects in contact with one another."— Presentation transcript:

1 Coefficients of Friction Static vs. Kinetic

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

3 Kinetic Friction The force that is exerted on one surface by another when the surfaces are in motion. Coefficient of Kinetic Friction=μ k F f = μ k x F n 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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