# Algebra Help

1. Mar 16, 2009

### Jordash

1. The problem statement, all variables and given/known data

mgh=1/2mv^2+1/2mr^2(v/r)^2

I need to solve for v, I'm really stuck on Algebra can anyone show me the steps I'd take to solve for V?

Thanks

2. Relevant equations

3. The attempt at a solution

Tried thinking it through but i'm getting stuck :( :(

2. Mar 16, 2009

### cse63146

Here's a hint:

$$(\frac{v}{r})^2 = \frac{v^2}{r^2}$$

also, if the variable m on the left hand side of the equation is the exact same m as on the right side, you can divide both sides by m to get rid of it.

3. Mar 16, 2009

### Jordash

Thanks for the help i'll try it, anyone know of resources that help you learn Algebra like this, it's really confusing to me.

Thanks

4. Mar 16, 2009

### cse63146

5. Mar 16, 2009

### Jordash

Cool thank you, And does anyone know a good site to learn Physics it's all going over my head in class.

6. Mar 16, 2009