1. The problem statement, all variables and given/known data Known: - Mass of the chopstick - Gravity 2. Relevant equations So the alpha(angular acceleration) can be found 3. The attempt at a solution By knowing angular acceleration, I successfully wrote a program that simulate a chopstick falling onto my hand. But all of this is assuming my hand didn't move at all. Currently in my simulation, only the gravitational force affect the angle change (angular acceleration). My question: How my hand affect the angular acceleration? I have these data: - My hand's acceleration in x, y and z axis.