1. The problem statement, all variables and given/known data A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 3.0 m/s at the end of 3.0 s. At that instant, the kinetic energy of the system is 60 J and each mass has moved a distance of 4.5 m. Determine the values of m1 and m2. 2. Relevant equations The equation I know that must be used is K=.5mv^2 where K is kinetic energy, m is mass, and v is velocity. But I'm having a hard time finding another equation to solve for the masses. 3. The attempt at a solution Sorry if the pictures are hard to see my writing in. I tried to edit them so my writing was easier to see.