An 800-N billboard worker stands on a 4.0-m scaffold weighing 500 N and supported by vertical ropes at each end. How far would the worker stand from one of the supporting ropes to produce a tension of 550 N in that rope?
A、1.4 m;
B、2.0 m;
C、2.5 m;
D、2.7 m;
E、3.7 m;
F、1.7 m
发布时间：2025-08-22 04:35:57
