# How to derive the law of conservation of mechanical energy

1. Oct 29, 2008

### Chase R

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

Derive the Law of Conservation of Mechanical Energy starting from the Work-Energy Theorem. State any assumptions.

2. Relevant equations

I'm not really sure where to start with this. Basically how to end up with the equation 0=$$\Delta$$U+$$\Delta$$K

3. The attempt at a solution

2. Oct 30, 2008

### Chase R

Anyone? It's for a lab that's due tomorrow morning. Any little info on where I should start with this would be great! By the way, if it helps, the procedure for this lab was a cart that it is getting pulled forward by a hanging mass. There was a force sensor to measure the tension in the string and a position sensor.