Recent content by AXRY

Would I normally show the path of the current in a loop with an ideal voltmeter even though I=0, I just feel like the current would still travel down that path. The solution specifying that there shouldn't be any arrows at all seems odd to me...

Homework Statement (see attached file) Homework Equations Kirchhoff's laws The Attempt at a Solution (see attached file) I only included the work for measurement 1 since measurement 2 follows from that. I got both voltage values correct. However the paths of the current flow was incorrect...

So here is my attempt: If we lift the weight W by a small vertical distance Δh, W will gain P.E. of Δh x mg in the process. Since energy is conserved, the work done by the wire (i.e. the shortening of the wire by a small length, which we call Δl must be equal to the gain in P.E. by the weight.)...

Does the direction of the virtual displacement matter? Or can I just say that the weight would move an arbitrary small value downwards? This would imply a lengthening in the string right?

Well I think it's when you move a body by a virtual displacement, which will enable you to compute all the possible sums of the work done by each component in the mechanical system. I tried to do this in the problem above: We can take the weight W and imagine it moving from it's current...

Do you have any hints on how to solve this using virtual work?

Homework Statement See attached picture. Homework Equations Change in work = force x distance moved The Attempt at a Solution So I took the ratio AC/AB = 1/ $\sqrt{2} $ which I set equal to T/50 where T is the tension we want to find. Solving this gave me T=50/ $\sqrt{2} $. I just wanted to...