Solving Static Problem: Help Needed

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SUMMARY

The discussion focuses on a static problem involving a horizontal bar supporting a sign via a cable. The tension in the cable is 2400 N, and the sign weighs 300 N. The force exerted by the bar on the sign is calculated to be 2381.18 N using the Pythagorean theorem (a² + b² = c²). The angle between the cable and the building is confirmed to be 82.8 degrees, while the angle between the cable and the bar is 7.2 degrees.

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static problem..please Help

Homework Statement



a horizontal bar that is sticking straight out from the side of a building has a cable attached at its end. if the tension in the cable is 2400 N when it is supporting a sign that weighs 300N, what force is the bar exerting on the sign and what is the angle between the cable and the building

Homework Equations



a2 + b2 = c2
cos theta= adj/hyp
sin theta= opp/hyp
tan theta= opp/adj


The Attempt at a Solution




for the force of the bar exerting on the sign I have 2381.18N by using the a2 + b2= c2 equation.
I'm not sure which degree angle is it really asking for in my diagram. I think its the 82.82 degrees.
I know one of the degrees is a right angle, which is 90 degrees.
However, for the second question is my answer correct?? or is it askin for the other degrees?? which is 7.2 degrees.

Thank you for all help!
 
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phys1618 said:

Homework Statement



a horizontal bar that is sticking straight out from the side of a building has a cable attached at its end. if the tension in the cable is 2400 N when it is supporting a sign that weighs 300N, what force is the bar exerting on the sign and what is the angle between the cable and the building

Homework Equations



a2 + b2 = c2
cos theta= adj/hyp
sin theta= opp/hyp
tan theta= opp/adj


The Attempt at a Solution




for the force of the bar exerting on the sign I have 2381.18N by using the a2 + b2= c2 equation.
I'm not sure which degree angle is it really asking for in my diagram. I think its the 82.82 degrees.
I know one of the degrees is a right angle, which is 90 degrees.
However, for the second question is my answer correct?? or is it askin for the other degrees?? which is 7.2 degrees.

Thank you for all help!
Yep, looks good; it is asking for the angle between the cable and building, which is the 82.8 degrees. Draw a quick sketch; the 7.2 degrees is the angle between the cable and bar.
 


thank you thank you
 

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