Physics help needed!!!?

you should ask my daddy!!!!!!!!!!! haha hes a physics profesor at UCD. lol :D sry if this doesn't help much. But take my advice, don't just go around asking ppl on the interent. Once I did and they gave me a completely random, and false answer. I believed it and turned the paper in. Boy did I get in trouble... and marked off a lot of points! If you don't understand something just ask someone in your class or ur teacher! HOpe this helps!