1. The problem statement, all variables and given/known data A girl and a boy are sitting in a see saw. The girl is 36 kg and sitting 5 m from the fulcrum. The boy is sitting 3 m from the fulcrum. Calculate the mass of the boy and the force on the fulcrum. 2. Relevant equations Fr1=Fr2 3. The attempt at a solution I solved for the boys mass by using the Fr1=Fr2 equation. I got 60 kg as the boys mass. I don't know how to solve for the force on the fulcrum.