The 3.0-m-long, 100 kg rigid beam in the following figure is supported at each end. A 78 kg student stands 2.0 m from support 1.
How much upward force does support 2 exert on the beam? (Sketch a diagram clearly showing the line of actions of the forces and the moment arms).
T = (force) x (moment arm)
Fr sin θ
Use sum of the torques is equal to zero.