1. The problem statement, all variables and given/known data A cart goes down a ramp with an incline of 10 degrees with acceleration A. Would adding mass on that cart change the acceleration? 2. Relevant equations F = ma 3. The attempt at a solution so I tested this in lab and no, the added weight didn't affect the acceleration of the cart. It went down at the same rate. How can I mathematically prove this? I remember an experiment where a feather and a marble dropped at the same rate inside a vacuum so mass didn't affect acceleration in that case.