Hard Physics Question

Doc Al

Why don't you really impress your teacher and work it out for yourself? Seriously, you've been given several ways of solving this. Pick one and work out all the steps. (We'll make sure you do it right. )

For example, you can start with what I gave in post #8.

Jamez

Thanx all, you have been a great help and have showed me how to work it out.
I've wrote down the process to show my teacher.