A block placed on a rough horizontal surface is pulled by a horizontal force F . Let f be force appl

English

Gujarati

Hindi

4-2.Friction

medium

A block placed on a rough horizontal surface is pulled by a horizontal force $F$. Let $f$ be the force applied by the rough surface on the block. Plot a graph of $f$ versus $F$.

Option A

Option B

Option C

Option D

Solution

$OA$ part of graph shows static friction which is self adjusting force. In this region frictional force = external force $(F)$.

Point $B$ shows limiting friction which represent maximum static friction.

Once block comes into motion there is kinetic friction. Kinetic friction is less than static friction.

Standard 11

Physics

Share

Similar Questions

Consider a car moving along a straight horizontal road with a speed of $72\, km/h$. If the coefficient of kinetic friction between the tyres and the road is $0.5,$ the shortest distance in which the car can be stopped is …….. $m$ .$[g = 10\,m{s^{ – 2}}]$

medium

(AIPMT-1992)

A $1\,kg$ block is being pushed against a wall by a force $F = 75\,N$ as shown in the Figure. The coefficient of friction is $0.25.$ The magnitude of acceleration of the block is …….. $m/s^2$

medium

A car accelerates on a horizontal road due to force exerted by

easy

A block of mass $5\, kg$ is on a rough horizontal surface and is at rest. Now a force of $24\, N $is imparted to it with negligible impulse. If the coefficient of kinetic friction is $0.4$ and $g = 9.8\,m/{s^2}$, then the acceleration of the block is …….. $m/s^2$

medium

In the given figure the acceleration of $M$ is $(g = 10 \,ms^{-2})$

hard