Q92 / 180 · NEET 2018 · Physics

Which one of the following statements is incorrect?

A
Frictional force opposes the relative motion
B
Limiting value of static friction is directly proportional to normal reaction
C
Rolling friction is smaller than sliding friction
Correct answer
D
Coefficient of sliding friction has dimensions of length

Solution

∵ f_{\lim} = μ_{s} N

\Rightarrow μ_{s} = \frac{f_{\lim}}{N}

Coefficient of sliding friction has no dimension

Hence, the correct answer is option: 'D'.

Relevant Questions

A box of mass kg is kept on the floor of a stationary trolley. The coefficient of static friction between the box and the trolley is . Keepi2026 (Cancelled)Frictional force
There are two inclined surface of equal length (L) and same angle of inclination with the horizontal. One of them is rough and the other is 2025Frictional force
Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of stati2023 (All India)Frictional force
A block of mass is placed on an inclined rough surface (as shown in figure) of coefficient of friction . If , the net force (in ) on the blo2023 (Manipur)Frictional force
Calculate the acceleration of the block and trolly system shown in the figure. The coefficient of kinetic friction between the trolly and th2020 (Phase 2)Frictional force
A block A of mass m 1 rests on a horizontal table. A light string connected to it passes over a frictionless pulley at the edge of table and2015 (Phase 1)Frictional force