The figure below shows forces acting at various points on a metal rod. The angles $=42,=31,=25.$ The length $l=3\mathrm{.}8m.$ Find the net torque $($in $N*m)$ on the rod about the following axes.

$($i$)$

$($a$)$ an axis through $O$ perpendicular to the page

magnitude

What does the right hand rule say about the direction of the torques acting about $O?$ How does that affect the signs of the torque components? What is the formula for a magnitude of a cross product? What is the angle between each position vector and force vector? N $-$ m

direction

$($b$)$ an axis through $C$ perpendicular to the page

magnitude

What does the right hand rule say about the direction of the torques acting about C$?$ How does that affect the signs of the torque components? What is the formula for a magnitude of a cross product? What is the angle between each position vector and force vector? $N*m$

direction

out of the page

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