The forces F2 and F3 form a couple The magnitude of the mome

The forces F_2 and F_3 form a couple. The magnitude of the moment of the couple about the x-axis is: 0 N-m 40 N-m 160 N-m 200 N-m The total (resultant) moment about point O for the force system shown is: -30j N-m -30j + 20k N-m -30i + 40k N-m -30j - 40k N-m

Solution

A) moment = force *distance between two forces

= 20*2 =40 N-m

B) Total moment about O = -(30*1)I + (20*2)K