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M1 hard moment question involving vectors

hi guys can I get some help on this question please ? How do u work out the distance of the force to a is it the distance from the origin? It's the perpendicular distance but I am getting confused . Thanks

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Reply 1

Middriver

Original post by coconut64

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Moment=F*Perp distance, I'd draw the force touching A not going through the origin then add the the forces after considering whether they act clockwise or anti-clockwise.

Reply 2

coconut64

Original post by Middriver

Moment=F*Perp distance, I'd draw the force touching A not going through the origin then add the the forces after considering whether they act clockwise or anti-clockwise.

Hi, how do you do that because the forces are acting in the opposite directions and also I don't know which is the perp distance. Thanks

Reply 3

Zacken

Original post by coconut64

Hi, how do you do that because the forces are acting in the opposite directions and also I don't know which is the perp distance. Thanks

I'd advise against doing this question, it seems like one where the best case is using the scalar product which I don't think you've heard about you. It's not from a real paper, is it?