Limiting friction is

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4-2.Friction

easy

The limiting friction is

AAlways greater than the dynamic friction

BAlways less than the dynamic friction

CEqual to the dynamic friction

DSometimes greater and sometimes less than the dynamic friction

Solution

Limiting friction is the maximum static friction which comes into play when the body is just at the point of motion. Once the sliding has begun, the two surfaces have not sufficient time to fully settle down and hence cavities will not fully interlock and we require lesser force to keep the body in motion. Hence we can say that it is always greater than dynamic friction.

Standard 11

Physics

A block of mass $m$ lying on a rough horizontal plane is acted upon by a horizontal force $P$ and another force $Q$ inclined at an angle $\theta $ to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is

hard

Meena applies the front brakes, while riding on her bicycle along a flat road. The force that slows her bicycle is provided by the

medium

(KVPY-2020)

In the figure shown, horizontal force $F_1$ is applied on a block but the block does not slide. Then as the magnitude of vertical force $F_2$ is increased from zero the block begins to slide; the correct statement is

medium

A block of mass $M$ rests on a rough horizontal table. A steadily increasing horizontal force is applied such that the block starts to slide on the table without toppling. The force is continued even after sliding has started. Assume the coefficients of static and kinetic friction between the table and the block to be equal. The correct representation of the variation of the frictional force $f$, exerted by the table on the block with time $t$ is given by

medium

(KVPY-2010)

If for an inclined plane coefficient of static friction is ${\mu _s} = \frac{3}{4}$, then for the inclined plane angle of repose will be …….. $^o$

easy

The limiting friction is

Solution

Similar Questions

A block of mass $m$ lying on a rough horizontal plane is acted upon by a horizontal force $P$ and another force $Q$ inclined at an angle $\theta $ to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is

Meena applies the front brakes, while riding on her bicycle along a flat road. The force that slows her bicycle is provided by the

In the figure shown, horizontal force $F_1$ is applied on a block but the block does not slide. Then as the magnitude of vertical force $F_2$ is increased from zero the block begins to slide; the correct statement is

If for an inclined plane coefficient of static friction is ${\mu _s} = \frac{3}{4}$, then for the inclined plane angle of repose will be …….. $^o$

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