Graph Between Applied Force And The Force Of Friction MCQ - Practice Questions with Answers

At A static friction is the maximum

OA = Represents static friction

Beyond A, the force of friction decreases slightly

2.    

The angle between the normal reaction and resultant contact force is called the angle of friction(Ө).

$\begin{aligned} & \tan \theta=\frac{F_l}{R} \\ & \tan \theta=\mu_s \\ & \frac{F_l}{R}=\mu_s \\ & \mathrm{R}=\text { Reaction } \\ & F_l=\text { Force of limiting friction }_{\theta=\tan ^{-1}\left(\mu_s\right)}\end{aligned}$

3.  

$\begin{aligned} & S=\sqrt{F^2+R^2} \\ & S=\sqrt{(\mu m g)^2+(m g)^2} \\ & S=m g \sqrt{\mu^2+1} \\ & S=\text { Resultant force } \\ & \mu=\text { Coefficient of friction } \\ & \text { If } \mu=0, \text { S(will be minimum), } \circ S=m g\end{aligned}$