Problem#$1$

Calculate the moment $,$ and $M_C)$ of the $550-lb$ force about the points $O,B,$ and C $.$

Moment Mo

$1359$

$1429$

$1103$

$1255$

Moment MB

$0.$

$100\mathrm{.}0$

$145\mathrm{.}0$

$250\mathrm{.}0$

Moment MC

$357\mathrm{.}0$

$265\mathrm{.}0$

$0.$

$206\mathrm{.}0$