A uniform plank is 6. 0 m long and weighs 80 N. It is balanced on a sawhorse at its center. An additional 160 N weight is now placed on the left end of the plank. The keep the plank balanced, it must be moved what distance to the left?
1. 2. 0 m
2. 6. 0 m
3. 0. 50 m
4. 1. 0 m
5. 1. 5 m
