roblem:

$($of $24)$

Do not round intermediate answers. Give your final answer$($s$)$ to three decimal places. Check your units.

It is known that a vertical force of $540$ N is required to remove the nail at $C$ from the board. As the nail first starts moving,

determine: $$

$($a$)$ the moment about $B$ of the force exerted on the nail,

$($b$)$ the magnitude of the force $P$ which creates the same moment about $B$ if $=6,$

$($c$)$ the smallest force $P$ which creates the same moment about $B.$ Note that for $P$ to be minimum, it must be perpendicular

to the line joining points A and $B.$

$M(B)=$

$N-m$

$P=$

$N$

$P(min)=$

$N$