- #1

Jorgen1224

- 36

- 0

## Homework Statement

There is a train of length d and speed v. It is heading towards a hill with height h and length of each side l. What velocity requirement must be met so that the train can go up and down the hill?

## Homework Equations

E

_{k}=m⋅v

^{2}/2

E

_{p}=m⋅g⋅h

## The Attempt at a Solution

I'm basically stuck at conversation of energy. Train needs to have kintetic energy equivalent to potential energy mgh, but calculating v from this equation seems pointless since it doesn't include either length. I have no idea how to include either of them.