A block of mass $10\, kg$ moving at $10\,m/s$ is released to slide on rough surface having coefficient of friction $0.2.$ It will stop by travelling distance ........ $m$

- A
$20$

- B
$25$

- C
$30$

- D
$35$

Two beads connected by massless inextensible string are placed over the fixed ring as shown in figure. Mass of each bead is $m$ , and there is no friction between $B$ and ring. Find minimum value of coefficient of friction between $A$ and ring so that system remains in equilibrium. ( $C \to $center of ring, $AC$ line is vertical)

The limiting friction between two bodies in contact is independent of

A body of mass $10$ kg slides along a rough horizontal surface. The coefficient of friction is $1/\sqrt 3 $. Taking $g = 10\,m/{s^2}$, the least force which acts at an angle of $30^o $ to the horizontal is ...... $N$

In figure, the coefficient of friction between the floor and the block $B$ is $0.2$ and between blocks $A$ and $B$ is $0.3$. ........ $N$ is the maximum horizontal force $F$ can be applied to the block $B$ so that both blocks move together .

When two surfaces are coated with a lubricant, then they

- [AIIMS 2001]