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how?

can you show to me

"How" meaning to take moments?

yes but i'm confuse >.<

roller gve vertical force to the wall so therefore

|dw:1375615728179:dw|

|dw:1375615816627:dw|

also

|dw:1375617070605:dw|

yes u are right

So you're good for both problems?

no

lets continue master

|dw:1375616151580:dw|

Keep going, you're on the right track.
I have an appointment, so have a little time left.

Yes, what about the diagram?

what diagram?

In the case of the ladder, there is a horizontal frictional force, F.|dw:1375617403359:dw|

But taking moments at A will ignore that.

is parallel to the wall

|dw:1375616451865:dw|

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Would that help?

yes u are correct tension is there now can you teach me to take moment

where can i put my moment

basically i dont know where can i put the moment >.<

yes i want to use the moment clock wise

so therefore?

yes i familiar that Ra=mg

wow

i become your fan :)

T=1273.06 ?

so im right?

thats all for the blue one?

i need also to solve the red one >.< dont go :)

Can you draw the FBD for the red one?

yes

|dw:1375618026746:dw|

let me put the Rb and Ra and correct me if im wrong

|dw:1375618200791:dw|

Here you know (again) that T=W=mg.
|dw:1375619330484:dw|

and that Ra=Rb by equilbrium of horizontal and vertical forces, right?

where did tou get 10 and 5 the distance of the assume box is 12m

i think yes their are equal but im not sure

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