Which one of the following statements is incorrect?

1. Rolling friction is smaller than sliding friction.
2. The limiting value of static friction is directly proportional to the normal reaction.
3. Frictional force opposes the relative motion.
4. The coefficient of sliding friction has dimensions of length.
Subtopic:  Friction |
 79%
From NCERT
NEET - 2018
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital