The force of sliding friction is always
(A) greater than the force of static friction.
(B) less than the force of static friction.
(C) greater than the maximum value of static friction.
(D) less than the maximum value of static friction.
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What this question is about
The force of sliding friction is always
(A) greater than the force of static friction. --- No.
The force of static friction can be larger.
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The force of sliding friction is always
(B) less than the force of static friction. --- No.
The force of static friction ranges from zero
to a maximum. Sliding friction is never zero.
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The force of sliding friction is always
(C) greater than the maximum value of static friction.
No. --- Skids would not be a problem if that were true.
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The force of sliding friction is always
(D) less than the maximum value of static friction. --- Yes.
That's why skids are a problem.
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