If the resultant of $n$ forces of different magnitudes acting at a point is zero,then the minimum value of $n$ is

$A$ rod $(AB)$ is attached to a fixed point $(C)$ using a light rope $(AC)$. The other end of the rod $(B)$ is resting on ice with negligible friction,and the system is in a stationary position. Which of the following can be the equilibrium configuration of this system?

$A$ block of weight $W$ is suspended by a string and pulled by two horizontal forces $\overline{F}_1$ and $\overline{F}_2$ such that the string makes an angle of $45^{\circ}$ with the vertical. If the tension in the string is $60\,N$, find the magnitude of the horizontal forces $\overline{F}_1$ and $\overline{F}_2$ (assuming they are equal) and the weight $W$ of the block.

Three blocks are placed as shown in the figure. The masses of $A$,$B$,and $C$ are $m_1$,$m_2$,and $m_3$ respectively. The force exerted by block $C$ on block $B$ is .........

Two masses $m$ and $M$ are attached to the strings as shown in the figure. If the system is in equilibrium,then

$A$ weight $Mg$ is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is ......