안녕하세요. 현재 physics ap를 공부하고 있고 이제 막 시작한 학생입니다.
선생님께서 가르쳐 주시지는 않고 그냥 문제만 준 후 알아서 배워서 풀어오라는 것인지는 
잘 모르겠지만 가뜩이나 World History comparative essay도 있는데 말이에요 ㅠㅠ.
그리고 physchology도 시험 준비해야 하는데 ㅠㅠ....

 지금 제가 풀고 있는 문제는
http://www.google.co.kr/url?sa=t&source=web&cd=2&ved=0CDAQFjAB&url=http%3A%2F%2Fwww.sd23.bc.ca%2F~lsloan%2FFOV1-00089A20%2FFOV1-000C3498%2FS0977A49F.8%2FTorq_Equil%2520Review.doc&rct=j&q=%22a%20floodlight%20is%20suspended%20from%20two%20cables%20as%20shown%20in%20below%22&ei=WFSaTtnqJcG5iAePqY2sAg&usg=AFQjCNEo_xgBFiE9Bh3NYMmA-T5wr1R96A&cad=rjt


http://kss.sd69.bc.ca/pages/courses/Physics%2012/Phys12Exams/jan98key.pdf

이것인데요, 첫번째 문제가 tenshion이 140N인 문제부터 막혔습니다. 기본 개념 소스로 사용한 페이지는  
http://www.rmutphysics.com/charud/scibook/applied-physics/8-equilibrium/51-1.pdf 
입니다. 하지만 여기서 예시로 보여주는 것을 보면 분명히 오브젝트의 무게가 나와 있는데 제가
푸는 문제는 전혀 그렇지 않아서요 ㅠ. 선생님이 답은 주셨지만 과정을 해내야 하는 문제인데,
도와줏면 ㅇ안될까요? 아주 쉬운 고등학생 문제인데 말이에요 ㅠㅠ.