Sorry, Double posted it.
Please help me out guys, just help me solve a couple :/
In future you should post in the homework forums. You're not a new member, and have posted in the correct place before, so why is this in general physics?
What do you mean by a corrections sheet? Have you had this piece of work marked once before and need to correct your answers?
Oops, My bad. What I mean by corrections sheets is that my teacher gives us the answers to the problems for our homework. We correct the problems and hand it in. Without correction we get a 75% :/
This exact type of problem is covered in a tutorial I wrote a couple of years ago. Click the 1st link in my footer and then look at the 3rd pdf. Gives you a step-by-step.
Separate names with a comma.