The $5\mathrm{.}3-kN$ force $F$ is applied at point $A.$

$($a$)$ Compute the moment of $F$ about point $O,$ expressing it both as a scalar $($positive if CCW$,$ negative if CW $)$ and as a vector quantity.

$($b$)$ Determine the coordinates of the points on the $x-$ and $y-$axes about which the moment of $F$ is zero.

Assume $x_A=1\mathrm{.}5m,y_A=2\mathrm{.}2m,a=2,b=4.$

Answers:

$($a$)$ Scalar:

$M_O=$

$kN*m$

Vector:

i

$(b)$

On the $x$

axis:

$x=$

$($ k$)$

On the $y$

axis:

i