A weight of 2 T is supported by a three bar truss. We want to find the forces in the three bars.(adsbygoogle = window.adsbygoogle || []).push({});

(This truss is a 3-4-5 triangle so that sin and cos are either 0.6 or 0.8. See below

Resolving vertically at the top we find 0.8F1 + 0.6 F2 = 2 This is Equation 1

Resolving horizontally at the top we find 0.6F1 = 0.8F2 This is equation 2

Resolving horizontally at the bottom left we find 0.6F1 = F3

a) Write each of the equations in th eform p.F1 + r.F2 + r.F3 = k

b) Solve these questions simultaneously.

I have no idea how to do this.

I'll try and put up a picture of the question as soon as possible.

Thanks.

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# Homework Help: Simultaneous equations?

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