In the Fig. shown a time dependent force F expressed as ${\displaystyle F=kt}$ is applied on a block of mass 5 kg. Coefficient of static and kinetic friction is ${\displaystyle {\mu }_s=0.4}$ and ${\displaystyle {\mu }_k=0.3}$. Motion begins when ${\displaystyle t=2}$ sec draw a acceleration vs time graph for block. ${\displaystyle (m=5kg,{\mu }_s=0.4,{\mu }_k=0.3)}$

A block of mass M is sliding down the plane. Coefficient of static friction is ${\mu }_s$ and kinetic friction is ${\mu }_k$. Then friction force acting on the block is :

In the figure shown, if friction coefficient of block 1 kg and 2kg with inclined plane is ${\mu }_1=0.5$ and ${\mu }_2=0.4$ respectively, then

A force $F=2t$ is spplied at $t=0$ sec to the block of mass m placed on a rough horizontal surface. The coefficient of static and kinetic friction between the block and surface are ${\mu }_S$ and ${\mu }_k$ rspectively. Which of the following graphs best represents the acceleration vs time of the block$({\mu }_S>{\mu }_k)$?

Coefficient of kinetic friction and coefficient of static friction between two blocks is ${\mu }_k$ and ${\mu }_s$ respectively. In general

In Fig the block are at rest a force of $10N$ act on the block of $4kg$ mass .The coefficient of staic friction and the coefficient of kinetic friction are ${\mu }_s=0.2\text{and}{\mu }_s=0.15$ for both the surface in contact The magnitudeof frcition force acting between the surface of contact between the $2kg$ and $4kg$ block in this situation is

A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and $10m/s^{-2}$. If a horizontal force of 50N is applied on the block, the frictional force is

A block of mass 5kg is resting on a rough surface as shown in the figure. It is acted upon by a force of F towards right. Find frictional force acting on block when F = 5N ( mu_(s) =0.6 , mu_(k) = 0.5)

If the friction coefficient between the blocks are ${\mu }_s=0.52$ and ${\mu }_k=0.50$ , in how much time , the upper block will lose contact with the lower block.

A block mass $m=2kg$ is accelerating by a force $F=20N$ applied on a smooth light pully as shown in fig 7.86 If the coefficient of kinetic friction between the block and the surface is $\mu =0.3$ find its acceleration

A block of mass m is placed over a rogh surface with coefficents of static and kinetic as ${\mu }_s\text{and}{\mu }_k.$ A force F is applied to move block .Surface f is the force of fricty=tion between block and ound . Then chose the wrong opition (s).