1. The problem statement, all variables and given/known data This is for a lab report. Research Question: Why does a yoyo fall slower when unraveled than a yoyo in free fall? I need to find the time it takes for a yo-yo to travel 1 meter (falling) while unraveling/unwinding. The height is 1 meter. r = inner radius (I'm not looking for an actual answer, just the equations to solve it). 2. Relevant equations h = 1/2 at^2 (free-fall of a yoyo) I = 1/2 mr^2 (moment of inertia for a yoyo) 3. The attempt at a solution h = 1/2 at^2 ... I do not know how to start this problem at all... Edit: mgh = 1/2 mv^2 + 1/2Iw^2 I = 1/2 mr^2 w = v/r mgh = 1/2mv^2 + 1/4mv^2 mgh = 3/4mv^2 gh = 3/4v^2 wait ... why am I solving for velocity?!?!?! I need to find time ... thanks!