I hope i've posted this in the right forum.

I need help with the following:

http://i259.photobucket.com/albums/h...th-problem.jpg
To be honest I'm not sure what the question is asking for. I've tried asking my course tutor but he seems reluctant to help me or explain what I need to do. Anyway, I was hoping someone here could explain to me what the question is asking for as I can't seem to make sense of it.

From what I understand the "first priciple" describes a number of "lesser" formulas that eventually come together to form

**v=rw**. I have some understanding of AS-Level mechanics so I know some formulas such as

**s=ut+(1/2)atxt** etc but, as I've said before, I can't make sense of this problem. Can anyone help?

Thank you!