Embibe Experts Solutions for Chapter: Friction, Exercise 1: Exercise 1

A block of mass $m$ slides along a floor while a force of magnitude $F$ is applied to it at an angle $\theta$ as shown in figure. The coefficient of kinetic friction is ${\mu }_K$. Then, the block's acceleration $a$ is given by : ($g$ is acceleration due to gravity)

A solid cylinder of mass $m$ is wrapped with an inextensible light string and, is placed on a rough inclined plane as shown in the figure. The frictional force acting between the cylinder and the inclined plane is:

[The coefficient of static friction, ${\mu }_{\mathrm{s}}$, is $0.4$ ]

A block of mass $1 \mathrm{kg}$ lies on a horizontal surface in a truck. The coefficient of static friction between the block and the surface is $0.6$. If the acceleration of the truck is $5\mathrm{m}{\mathrm{s}}^{-2}$, find the frictional force acting on the block.

A block placed on the horizontal is pushed momentarily with initial velocity $v$. The coefficient of friction between the block and surface is $\mu$. Block will come to rest after a time $t$ equal to ($g=$ acceleration due to gravity)

Consider on a rough horizontal surface a block is kept. A horizontal force just strong enough to move the block is acting on it, the force is maintained for $2$ seconds and then removed. The total distance moved by the box is '$S$' meters. What is the value of '$6S$'?$\left({\mu }_s=0.2, {\mu }_k=0.15, g=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

A box is placed on the bed of a truck. When the truck accelerates in the forward direction, then the direction of the force of friction between the lower surface of the box and the bed of the truck is

The normal reaction $N$ for a vehicle of $800 \mathrm{kg}$ mass, negotiating a turn on a $30°$ banked road at maximum possible speed without skidding is ____ $\times {10}^3 \mathrm{kg} \mathrm{m} {\mathrm{s}}^{-2}$.

If a block of mass ' $m$ ' placed on a plane inclined at an angle $\theta$, is on the verge of sliding, then the coefficient of friction between the block and the plane is given by