1. The problem statement, all variables and given/known data This isn't homework but I don't know where to post this type of questions so I will post it here. But, I am wondering what are the physics equations that describes the system of a candle that is lit and behaves like a seesaw? I have attached an image. Explanation: A candle, which is balanced between a pair of glasses (can be anything really), seesaws up and down on its own. The motion continues as long as the candle continues to burn. 2. Relevant equations Newton's Laws 3. The attempt at a solution Lets neglect the air currents in the room and since we can't easily calculate the mass distribution as a function of time, lets make assumptions for the mass and length of the candles. Can we estimate an equation for how mass is loss and thus, how the center of mass moves and taking into account that there is chaos in the system?