Which one of the following statements is

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Target Exam

CUET

Subject

Physics

Chapter

Laws of Motion

Question:

Which one of the following statements is incorrect?

Options:

Rolling friction is smaller than sliding friction.

Limiting value of static friction is directly proportional to normal reaction.

Coefficient of sliding friction has dimensions of length.

Frictional force opposes the relative motion.

Correct Answer:

Coefficient of sliding friction has dimensions of length.

Explanation:

Coefficient of sliding friction has no dimension.

Friction = \(\mu\) × Normal