Match each word to it's correct meaning.
 1. energy 
 force moving an object through a distance 
 2. joule 
 unit of measurement for mechanical energy 
 3. kinetic energy 
 weight hanging from a point and free to swing 
 4. mechanical energy 
 energy of a moving object 
 5. pendulum 
 stored energy 
 6. potential energy 
 kinetic and potential energy 
 7. work 
 ability to do work