Asked by chelsea
Hanging from the front office of a dental office is a sign that weighs 120N and is suspended at the end of a .8 meter long support beam that weighs 10N. What is the tension in a supporting wire that holds the sign at an angle of 20 degrees?
Answers
Answered by
bobpursley
I don't know in which direction the support beam is, I assume horizontal.
You have two things establishing equilibrium: sum of forces in any direction is zero, and sum of moments about any point is zero.
There is not much I can do here to work it, labeling the diagram is critical before writing the equations.
See prob 8:17 http://hep.physics.wayne.edu/~harr/courses/2130/f99/lecture13.htm
You have two things establishing equilibrium: sum of forces in any direction is zero, and sum of moments about any point is zero.
There is not much I can do here to work it, labeling the diagram is critical before writing the equations.
See prob 8:17 http://hep.physics.wayne.edu/~harr/courses/2130/f99/lecture13.htm
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