1. The problem statement, all variables and given/known data Okay, my chemistry teacher has given each of us an object, my object is a wooden block. We are required to find the mass of this object, WITHOUT massing the object. He has given us no procedure as we must go on simply our knowledge. Or yours :D 2. Relevant equations Possibly F=ma 3. The attempt at a solution The only solution I can come up with, is to drop the wood block from a certain height and and measure how long it takes to fall to the ground, find the acceleration, and use the graviational constant as the force. Unfortunately, unless I drop this from a great height, and have awesome reflexes, getting any accuracy will be difficult with my wristwatch. I was wondering if anyone else had any ideas.