A gymnast with mass m1 = 48 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 121 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam.
1)What is the force the left support exerts on the beam?
The Attempt at a Solution
So I just solved a problem where I solved for the tension in a string holding up a beam attached to a wall...etc. I am not really sure how to transfer the same equations to this situation. So far I know that the net force and net torque on the system is zero. So for example I know that a hinge in the other problem acts a net force of Mass of the beam by the gravity. Not really sure what formula to use for the beams.