Which of the Following Statements Is NOT True About Friction

question 5

Multiple Choice

Which of the following statements is NOT true about friction?

• A)µ_k is less than µ_s
• B)µ_k is independent of the relative speed of the surfaces in the range of about 1 cm/s to several meters per second.
• C)µ_k depends on the relative speed of the surfaces at speeds over several meters per second.
• D)The coefficients of friction depend on the nature of the surfaces.
• E)The force of static friction depends on the area of contact between the two surfaces.

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