# Homework Help: How they get the value of v1

1. Jan 28, 2009

### transgalactic

Last edited by a moderator: May 3, 2017
2. Jan 28, 2009

### Alewhey

Well it looks like the question is about a classical potential.

If a particle has an energy E and is moving in a potential V, then we have

Kinetic Energy = (E - V) = $$\frac{1}{2}mv^{2}$$

Then solve for v:

$$v = \sqrt{\frac{2(E-V)}{m}}$$