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New one: :jaw: Determine reactions then determine force and nature of force in member X

Can someone please... Briefly outline the different molding techniques for polymers

Ok, those answers are close. I asked my engineering teacher today, he said consider RHS of truss, and do in two steps using method of sections. He said don't bother about finding length of vertical member at B as it is too time consuming and so I assumed that length as 1.7m and got an answer of...

u mean CH = 207.8 is correct

yes, i used method of joints with a force polygon .. but wait, sry, i made error, used angle for Ra as 54deg instead of 55 so using sine rule, AB = sin(25) * (184.85/sin(120)) so AB = 90 [edit: yes it is in tension]

yeah I havn't been for a proper ride in ages (like since january). hey just re-did clutch in the KX last holidays and found a reciept for a part I got when we first pulled her down and it was dated in April ! lol I've taken the KTM for a run around the paddock for like an hour, but I need to do...

Answers for anybody interested: Ra = 184.85kN at 55deg above horizontal and to the left Rb = 131.19kN to the right (i did this one first) Now Question (for the same truss) Determine force in member AB (answer: AB = 86.82kN in tension)

ok, seeing as no-one else has one: Determine reactions Ra and Rb, and length x (length will help later on)

yes now anyone have any truss questions, while i draw up another (i have answers to it, btw)

using pythagorus distance = sq.root of 1*1-0.5*0.5 =0.8666

Now: Question: determine force in member CH

actually, working for sections is easy (270*1)-(300*0.5)+(BG*0.87)=0 (BG assumed in tension) BG= -120/0.87 =-137.93N therefore assumed direction incorrect BG = 137.93N in compression (note: I got 138.57N compressive, using method of joints

Actually, there are two ways to do this: method of joints, requires you to find horizontal and vertical components of AF and FG, then sum to find BG method of sections, cuts through BG, FG and FE, consider LHS of truss, take moments about external point between ED (at 30N down): takes into...

yes you are both correct I found FG using method of joints and got 34.64N Used this to find BG when sum the horizontals

I got answer as BG = 138.67N

CMCDragonkai thanks for the working a semiconductor is made of semiconducting material (eg: silicon is used mostly today) it has less conductivity than a metal but more than a non-conductor semiconductors are used for transistors, diodes, microchips, etc a transistor is the electronic...

ok, now for something harder determine force in member BG for the same truss btw, feel free to post any truss questions you have just draw the truss in paint or similar and upload to 'imageshack dot us' - no signup or anything and press on 'insert image' when you reply on bos, copy and paste...

Ok, I though it would help if we all did some truss analysis questions to start off with an easy one: Determine reactions R1 and R2 [edit: btw NOT to scale, all angles are meant to be 60deg (all equilateral triangles)]

agreed Lightweight High strength to weight ratio chemically inert thats more of an outline, can anyone explain? Question: Compare the different signals for black and white tv and for colour tv btw yz125 hey? that what u ride, i was on a kx100, now got a ktm250 - was going to take it away...

o h and heres a question to keep us going which of the following is a semiconductor: a) capicitor b) NPN transistor c) potentiometer d) resistor