Homework Help: SCIENCE

Posted by fei on Wednesday, July 27, 2011 at 10:26am.

a traffic light is supported by a cable that makes ang angle of 7 degree w/ the horizontal on each side of weight. what is the maximum safe weight of the light if the maximum safe tension in the cable 1200N

SCIENCE - drwls, Wednesday, July 27, 2011 at 10:32am
Draw a free body diagram. Apply a vertical force balance. If the cable is at the breaking point tension,

2*1200*sin7 = M*g

Solve for M, in kg

M = 30 kg

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