I am having a bit of trouble solving statics problems. its actually only 1 issue. I can do the trig and rest.(adsbygoogle = window.adsbygoogle || []).push({});

The question , like the one below...

http://img25.imageshack.us/img25/5403/q10lq.th.gif [Broken]

...usually asks to find the tension in one of the strings.In this case they asked for the tension in AC.

My question is, what do i take as the hypotenuse?

Do i take the weight as the hypotenuse or do i take the tension as the hypotenuse?

Below is how i have attempted to solve the question.

http://img133.imageshack.us/img133/2118/a15kz.th.gif [Broken]

However, taking the weight as the 'opposite', i get T = 3g / sin 30

Where as if i was taking the hypotenuse as the weight, then the answer would be correct. (14.7 N)

Am i drawing the diagram correctly? I am inserting the angles correctly?

I asked my teacher this question, and he said that you usually take the weight as the hypotenuse - however, he said this concerning mass-on-an -inclined-plane type questions, not these types of questions.

This is probably the only thing that will bring me down on my mechanics paper , so i would be very happy to solve this once and for all.

Thanks.

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Initially i pressed submit instead of preview, hence the reason the link didnt work!

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# Homework Help: Statics problem

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