Can you solve this mechanics question?

They are all equilateral triangles

need to find reactions and internal forces

They are all equilateral triangles

need to find reactions and internal forces

You mean can we do your homework for you?

How about you show us what you've got so far, what you think the method is, where you're getting stuck. Just give us something to show you've actually attempted the question instead of looking at it, deciding it's a bit difficult and asking us all to solve it for you.

They are all equilateral triangles

need to find reactions and internal forces

They are all equilateral triangles

need to find reactions and internal forces

I'm not sure what the symbols at the top left and right mean. Presumably they're used in engineering?

Having said that, you need to assigns tensions $T_i$ to each member of the truss, then form and solve simultaneous equations in the tensions. Bear in mind that the truss and all joints are in translational and rotational equilibrium, so at each joint, Newton II gives $\Sigma T_i = 0$ and you have $\Sigma M_i = 0$ about any point for the whole truss.

It looks like quite a lot of work to find all of the tensions though. If you're only interested in one of the members, you can use the method of sections to isolate it, but I can't remember how that works, in detail.

I've actually only seem those symbols in my degree.

The one they're pinned, fixed and rollers.

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So presumable a roller symbol means that at that joint, it can only supply a normal reaction force, but no transverse force?

It's more about freedom of movement. Rollers means that it can literally roll so it has lateral movement.

I don't see how that joint could move anyway. The truss is fixed at the top left, isn't it? In which case, the only point I can see of the roller is to restrict the force to a reaction force. But I'm not an engineer so maybe I'm confused.