A heavy box is to dragged along a rough horizontal floor. To do so, person $A$ pushes it at an angle $30^o$ from the horizontal and requires a minimum force $F_A$, while person $B$ pulls the box at an angle $60^o$ from the horizontal and needs minimum force $F_B$. If the coefficient of friction between the box and the floor is $\frac{{\sqrt 3 }}{5}$ , the ratio $\frac{{{F_A}}}{{{F_B}}}$ is
$\sqrt 3 $
$\frac{5}{{\sqrt 3 }}$
$\sqrt {\frac{3}{2}} $
$\frac{2}{{\sqrt 3 }}$
The tension $T$ in the string shown in figure is
The coefficient of static friction between a wooden block of mass $0.5\, kg$ and a vertical rough wall is $0.2$ The magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be $N$ $\left[ g =10\, ms ^{-2}\right]$
What is the maximum value of the force $F$ such that the block shown in the arrangement does not move ....... $N$
What is friction ? What is impending motion ?
Why are mountain roads generally made winding upwards rather than going straight up ?