Explain -“Static friction force opposes impending motion”.
Explain -“Static friction force opposes impending motion”.
Consider motion of an acceleration.
Let a box is lying at bottom of compartment of train.
- If box is lying stationary with compartment of train with motion of train, box also will get accelerated.
When train accelerate, friction force acting in horizontal direction will make box to move in direction of train.
If there was no friction, bottom of train would have moved further, box will try to retain its position due to inertia and would collide with rear part of compartment. But this do not happen in day to day life.
Thus, it can be said that static friction force opposes impending motion.
- This impending motion is opposed by static friction force ( $\mathrm{f}_{\mathrm{s}}$ ). This friction force provide equal acceleration in opposite direction of acceleration of train and keep box stationary.
Similar Questions
A small body slips, subject to the force of friction, from point $A$ to point $B$ along two curved surfaces of equal radius, first along route $1,$ then along route $2$. Friction does not depend on the speed and the coefficient of friction on both routes is the same. In which case will the body’s speed at $B$ be greater?
A small body slips, subject to the force of friction, from point $A$ to point $B$ along two curved surfaces of equal radius, first along route $1,$ then along route $2$. Friction does not depend on the speed and the coefficient of friction on both routes is the same. In which case will the body’s speed at $B$ be greater?
A force acts on a block as shown in figure. Find time when block loses contact with surface.
A force acts on a block as shown in figure. Find time when block loses contact with surface.
When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts
When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts
- [IIT 1990]
A block of mass $2\,kg$ moving on a horizontal surface with speed of $4\,ms ^{-1}$ enters a rough surface ranging from $x =0.5\,m$ to $x =1.5\,m$. The retarding force in this range of rough surface is related to distance by $F =- kx$ where $k =12\,Nm ^{-1}$. The speed of the block as it just crosses the rough surface will be ........... $\,ms ^{-1}$
A block of mass $2\,kg$ moving on a horizontal surface with speed of $4\,ms ^{-1}$ enters a rough surface ranging from $x =0.5\,m$ to $x =1.5\,m$. The retarding force in this range of rough surface is related to distance by $F =- kx$ where $k =12\,Nm ^{-1}$. The speed of the block as it just crosses the rough surface will be ........... $\,ms ^{-1}$
- [JEE MAIN 2022]
The frictional force acting on $1 \,kg$ block is .................. $N$
The frictional force acting on $1 \,kg$ block is .................. $N$