1. The problem statement, all variables and given/known data A person with a mass of 52 kg runs with a speed of 6.8 m/s jumps onto the outer rim of a merry-go-round. The merry-go-round has a radius of 1.5 m and can be modeled as a large disk. The merry-go-round was initially at rest before the person jumped onto it and rotates at 1.3 rad/s immediately after the person jumps on. What is the mass (in kg) of the merry-go-round? 2. Relevant equations Mm=Mass of merry go round Mp=mass of person R=radius of merry go round Vp= velocity of person w=angular velocity 3. The attempt at a solution I just need someone to make sure I set this up right. I solved this using momentum. The initial momentum was Mp*Vp*r The final momentum is 1/2*Mm*R^2*w+Mp*R^2*w Solving I got 52*6.8*1.5=1/2*Mm*(1.5^2)*1.3+52*(1.5^2)*1.3 So does it look right to anyone?