hi all, im having trouble working out the internal forces in this question, i tried before and got stuck working out the forces at joint C. i have been to see my tutor however he is on holiday till after the deadline for this assignment. handy... i was working out the forces by the method of joints when it occured to me that i had not taken into account any zero force members, having looked into what constitutes a zero force member i have concluded that there are none in this truss? obviously i cannot continue with the project untill i have calculated the interna forces.. i have some other questions regarding the project so far: 1) am i correct in thinking that there are no zero force members? 2) i dont understand the difference between the frist 2 questions; a) the internal forces in each member and b) the total forces at each joint. i t14hink once i get started it shouldnt be too bad. i worked out the force DC to be 19620N in compression the force DE to be 27746.87N in tension. i think that is right but i hit a problem by the time i get to joint DCB i wondered if it was because i didnt realise take into account zero force members :S what is more confusing is that although i think there is no zero force members the equation m> 2j-3 14>15 is not true therefore is it true that there is one zero force member and i am incorrect? im really confused about this please help.