2009-10-08, 02:25 PM
Oshiet, I think I figured it out!
The key word is that the whole system is in equilibrium. That means all forces acting on the system (cord, rod, and wall) should intersect at one point. If that wasn't the case, there would probably be momentum left over. Taking this information, we deduce that the point of intersection is in the middle of the length of cord, which means that the bottom-most part of the system is also h distance away from where the rod is touching the wall.
h = 12.###
Wow, statics seems so much easier now lmao >.< Finding the tension in S is trivial after knowing h.
The key word is that the whole system is in equilibrium. That means all forces acting on the system (cord, rod, and wall) should intersect at one point. If that wasn't the case, there would probably be momentum left over. Taking this information, we deduce that the point of intersection is in the middle of the length of cord, which means that the bottom-most part of the system is also h distance away from where the rod is touching the wall.
h = 12.###
Wow, statics seems so much easier now lmao >.< Finding the tension in S is trivial after knowing h.