Moments - Principle of moments question

[Jambob28]

I am trying to determine force X

I know it is the principle of moments so I think you use this equarion - not sure though:

In equilibrium
(the sum of)anticlockwise moments = (the sum of) clockwise moments

however I am not sure how to do it?

thanks for any help!

 

[tiny-tim]

Welcome to PF!

Hi Jambob28! Welcome to PF!

Hint: you need to take moments about a point

the question asks you where the third horizontal force is

which point do you think you should take moments about?

 

[Jambob28]

Hi thanks for your help.

I am guessing the other arrow would be at the same level as arrow B but right instead of left?
So
B Y
<-----------|||||----------->

I really am pretty useless so I'm probably wrong.

 

[tiny-tim]

hmm … look at the first diagram …

where is the third place where a force can be exerted?

 

[Jambob28]

well I guess you could pull it the other way?

so:
Y <-------------|||-----------> Pull