1. The problem statement, all variables and given/known data Use conservation of energy to find the final velocity of m1. m1=0.05kg m2=0.02kg m3=0.5kg r=16cm h=2m 2. Relevant equations Kinetic Energy=1/2m*v2 Rotational Kinetic Energy=1/2I*ω2 Gravitational Potential Energy=mgh 3. The attempt at a solution 0=(1/2m1v2) + (1/2m2v2) + (1/4m3) I simplify that to:m1gh / m1+m2+1/4m3=v2 Using that equation I get an answer that seems highly unlikely and its different from the answer I got when I used rotational kinematics, which was v=-1.92 m/s Can somebody please tell me what I'm doing wrong? Thanks for any help. I attached a picture with problem drawn out and my actual work so far which probably makes more sense than what I wrote here.