H C Verma Solutions for Chapter: Friction, Exercise 3: OBJECTIVE II

Let $F, F_N$ and $f$ denote the magnitudes of the contact force, normal force and the friction exerted by one surface on the other kept in contact, respectively. If none of these are zero,

The contact force exerted by a body $A$ on another body $B$ is equal to the normal force between the bodies. We conclude that

Mark the correct statements about the friction between two bodies.

A block is placed on a rough floor and a horizontal force $F$ is applied on it. The force of friction $f$ by the floor on the block is measured for different values of $F$ and a graph is plotted between them.

Consider a vehicle going on a horizontal road towards east. Neglect any force by air. The frictional forces on the vehicle by the road