physics
posted by lulu .
a 10m uniform beam of weight 100N is supported by two ropes at the ends. If a 400N erson sits at 2.0 m from the left end of the beam, what is the tension in the right rope?

Sum the moments about any point. I will do it from the left end.
100N*5m+400N*2mTright*10=0
solve for Tright.
Now, sum the forces vertically.
Tleft+Tright100N400N=0 solve for Tleft.