Embibe Experts Solutions for Chapter: Friction, Exercise 7: Exercise (Previous Year Questions)

A body of mass 100 g is sliding on a inclined plane with an inclination of 60°. What is the fricitional force experienced, if coefficient of friction is 1.7 ? (Take g = 10 m/s²)

The system shown in the figure is in equilibrium. The maximum value of W, so that the maximum value of static frictional force on 100 kg body is 450 N, will be :-

In the arrangement coefficient of friction between the two blocks is µ = $\frac{1}{2}$. The force of friction acting between the two blocks is :-

The coefficient of static friction, µ_s, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move ? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s²)

A horizontal force of $10 \mathrm{N}$ is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and wall is $0.2$. The weight of the block is :-

A block of mass m is in contact with the cart $C$ as shown in the figure. The coefficient of static friction between the block and the cart is $\mathrm{\mu }$. The acceleration $\mathrm{\alpha }$ of the cart that will prevent the block from falling satisfies:
                                                                                             

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 and from its other end another block $B$ of mass $m_2$. The coefficient of kinetic friction between the block and table is ${\mu }_k$. When the block $A$ slides on the table, the tension in the string is,

A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches $30°$, the box starts to slip and slides $4.0 \mathrm{m}$ down the plank in $4.0 \mathrm{s}$. The coefficients of static and kinetic friction between the box and the plank will be, respectively: