I have a basic problem where a child jumps tangentially onto the outer edge of a stationary merry-go-round, and you have to use conservation of momentum to find the final angular speed of the merry-go-round.
But the next part of the question asks "how much mechanical energy was lost to friction as the child jumped onto the merry-go-round?"
I tried using change in kinetic energy -- 1/2(m*r(omega)) - 1/2(mv2) = 0 but didn't get the right answer. I really can't think of how else I would find this, because the only thing that's changing is the kinetic energy. I would really appreciate it if somebody could help me out with this