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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Definitions:

Payback Method

A capital budgeting method that calculates the time needed to recoup the initial investment from the cash inflows.

Time Value Of Money

The idea that money in hand now is more valuable than the same amount in the future because of its ability to generate earnings.

Liquidity Bias

A preference or bias for investments that can be quickly converted into cash without significant loss in value.

Arbitrary Cut-Off

A subjective or chosen without any specific standard or rule, end point or threshold.