Imagine trying to build a portion of a draw bridge as in the following. The side towers reach h=100 meters high above the road level. The span between the towers is d=100 meters in distance. When the bridge is pulled up to let boats pass underneath there is tension on the supporting wire at the very beginning of the lift. The mass of the plank is m= 4e6 kg
1.) what is the total tension in the lift wire?
2.) What are the components of the force at the hinge between the plank and the tower?