Hi I am doing physics. I am totally lost..lol..My teacher is not very good at all and never shows any methods for any calculations, he jumps strait to the answers…. I really need some help with a question, I don’t have a clue as to what method I need to take to solve the question???...is there any chance sum1 can help me as I don’t know where to start with it???...I have set up the question as an attachment and if you could help me I would be VERY grateful….thanks…!!