1. The problem statement, all variables and given/known data Assuming smooth rolling with no resistance, it can be shown that the acceleration of a solid cylinder down an incline is equal to: a = 2/3 g sin(theta) The goal of my lab is to test the validity of the above equation 2. Relevant equations 3. The attempt at a solution The acceleration values I found using my measured inclination angles, are smaller than what they would be if i plugged them into the above equation. What does this mean? If this is the case, does that mean that the above equation isn't valid?