Solving Statics Rope Problem: Finding Force & Angle

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AI Thread Summary
The discussion centers on solving a statics problem involving a uniform strut supporting a 30-kg engine while being repaired. Participants clarify that the tension in the rope equals the weight of the engine, leading to the conclusion that the force exerted by the person on the rope can be calculated from this tension. To find the angle theta that the rope makes with the horizontal, additional calculations are necessary. For the forces exerted by the strut, it is suggested to take moments about the hinge to analyze the system further. Overall, the conversation emphasizes applying equilibrium conditions and moment calculations to solve the problem.
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Homework Statement


Using a uniform strut, a rigid brace hinged at the floor, a
person holds a 30-kg engine in equilibrium while it is being
repaired. The strut has a mass of 12.5 kg. A smooth rope passes
over a pulley at the end of the strut. (a) What is
the force exerted on the rope by the person? (Specify the direction
of this force by calculating the angle theta that the rope
makes with the horizontal.) (b)What forces are exerted by the
strut?

30coitw.jpg



Homework Equations


Fx=0
Fy=0
T=rF=0

The Attempt at a Solution


Looking at the engine, Fy=0 so Tension=mg. I don't know where to go from here.
 
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Hi Jstew! :smile:
Jstew said:
Looking at the engine, Fy=0 so Tension=mg.

Well, that's the answer to (a), isn't it? :smile:

For (b), start by taking moments about the hinge. :wink:
 
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