Alright, so I am over tired and pathetic. It is a first year University physics course, a lab, and generally really straightforward. Not a challenging course at all. But...Maybe I have been looking at this question for too long, but...ARG! I figured...Well, who else to ask for help? Because I love you all...share my pain! :lol: But not in a bad way., Just wondering if anyone had any ideas... I have to derive equation 3 from equations 1 and 2. And my brain is melting. I am going to blame it on too many midterms ;P Sorry if I put this in the wrong place... Thanks if anyone has any ideas!
If I can't find an answer, I am SO putting that!! And a little cartoon elephant. Because I want to. If I am going to bomb it, may as well make the TA laugh, right?
well, we need to eliminate t from the equation, so manipulate equation one to read: t=(Vo-V)/g Substitue into equation 2...I somehow ended up with an extra V**2 somewhere, but I'm pretty certain that's how to approach it EDIT: Okay, got it. Substituting into equation 2, s=Vo[(Vo-V)/g] - (g/2)[(Vo-V)/g]**2 expand and simplify (too much to type!) sg=Vo**2-VoVo1/2Vo**2-1/2V**2+VoV sg=1/2Vo**2-1/2V**2 isolating V... 1/2V**2=1/2Vo**2-sg V**2=Vo**2-2sg QED.
Are you all following this or am I the only stupid one who hasn't understood a single word :eusa_doh: Hope it all works out for you!
:lol: This virtual family is my favourite! I even have "sibblings" I can beg for homework help! (*hug*)
I might have understood it with a struggle about 20+ years ago but it's been so long since I've done anything like that so it's all a blur now. I always really struggled with the maths when I was studying electronic engineering at college, which was the main reason why I stopped at an HNC and didn't go on for a degree. Unless you've studied maths, physics or some other science though, you would not encounter something like that (thankfully)!
I got really excited when I saw this, but then realised you've already been given the answer. I'm fourth year Physics student, and this stuff is like the alphabet for me
Haha, I need to make a new friend (pokes Davo...) There is an easier way to do it too- Just square the first equation, and you can factor out the second. Just sub in "s" for that mess, and you are done! I feel silly, a couple years ago I could do this without thinking I am taking a first year physics class, because I have a boring course load (phisics is far more interesting than, say, Canadian Healthcare Reform...) and there weren't very many classes with open seats...
