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Physics
Which one of the following statements is incorrect ?
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Q. Which one of the following statements is incorrect ?
NEET
NEET 2018
Laws of Motion
A
Coefficient of sliding friction has dimensions of length.
59%
B
Rolling friction is smaller than sliding friction.
17%
C
Frictional force opposes the relative motion.
9%
D
Limiting value of static friction is directly proportional to normal reaction.
15%
Solution:
Coefficient of sliding friction has no dimension.
$f = \mu_s N$
$\Rightarrow \, \mu_s = \frac{f}{N}$