Single Choice

A block of mass $$5$$ kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are $$0.3$$ and $$0.1$$ and $$g=10ms^{-2}$$. The frictional force on the block is?

A$$25$$N
B$$15$$N
C$$10$$N
DZero
Correct Answer

Solution

The frictional force acting on the block is 0.
Frictional force acts only when a net external force acts on the object. And the frictional force acts in the opposite direction of external force preventing the impending motion.

SIMILAR QUESTIONS

Friction

In general, the relation between limiting friction ______ kinetic friction ______ rolling friction.

Friction

Rolling friction always greater than static friction.

Friction

The upper half of an inclined plane with inclination $$\phi$$ is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by

Friction

In general, the relation between limiting friction ______ kinetic friction ______ rolling friction.

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