Recent content by OnlinePhysicsTutor

Homework Statement This is a problem from one of my students, he is taking an undergrad module in optics. Most of the question is fine but I cannot see a neat solution to part ii Homework Equations These are the equations for the topic, but I am not sure if we are missing the relevant...

I'm happy with that as well, thanks.

I assume it is meant to be base 10, so I have edited post to include the base.

Homework Statement 2 - log10 3x = log10(x/12) Homework Equations logab=b log a log(a/b)= log a - log b The Attempt at a Solution 2 + log10 12= log10 x - x log10 3 Start seems simple but cannot see where to go from here, taking exponentials doesn't seem to help. Not sure what the next steps...

I get it now, thank you. I did moments on AB, gives a lateral force of 210N, which then works out to give the answer in the book.

edit; I assume the book answer is taking into account some lateral force also on AB, but I don't see how I would calculate that.

Homework Statement Please see attached picture Homework Equations principal of moments The Attempt at a Solution part a) is fine. For part b, I would Normally take moments about C. The force acting on BC at B must be the tension in AB. The geometry of the triangle gives and angle of 53.1 to...