How to calculate the Resultant force due to a Lever arm?

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SUMMARY

The discussion focuses on calculating the resultant force due to a lever arm, specifically addressing the mechanics of a rigid body with a hinge support at point B. The mass of the object is specified as 230 grams, which must be clarified as either mass or gram-force to accurately compute the horizontal force at point C. Participants emphasize the importance of establishing an orthogonal coordinate system and calculating forces and moments around the pivot point to ensure equilibrium in the system.

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  • Understanding of rigid body mechanics
  • Knowledge of torque and equilibrium principles
  • Familiarity with orthogonal coordinate systems
  • Basic concepts of forces and moments
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  • Study the principles of equilibrium in mechanics
  • Explore the use of orthogonal coordinate systems in force analysis
  • Investigate the differences between mass and gram-force in physics
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Mechanical engineers, physics students, and anyone involved in analyzing forces in rigid body systems will benefit from this discussion.

JPakt
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Homework Statement
Need help to find the resultant force at the Point "C" on an object, when a 230-gram force applied at Point "A" which is hinged at point "B".
Relevant Equations
F1.x1 = F2.x2
1581461413877.png
 
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The set up needs more description.
Does the blue line represent a rigid, but bent, arm, or two arms hinged independently at B?
Is B free to move around in space or constrained somehow?
Are there constraints on A's motion?

Also, you need to post an attempt, per forum rules.
 
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Thanks for your response.

- 2 Blue Line represents a rigid body
- Point B is hinge support which allows the rotation in an anticlockwise direction and applies force in the direction highlighted at point "C" on a spring.
- Point A represents the CG of the body

Hope I answered your questions.

Please find the attachment which illustrates my attempt to solve the problem.
 

Attachments

  • Moment arm.JPG
    Moment arm.JPG
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JPakt said:
Hope I answered your questions.
Yes, thank you.
The mass is 230gm. That is a mass, not a force, which makes your equations for forces incomplete.
Other than that, your method works, but there is an easier way. You do not need to find F1 to find the torque exerted by the weight. Likewise at the other end.
 
Got it. Thanks for your comments.

I appreciate your inputs
 
You need to determine whether or not those 230 grams are mass or gram-force, in order to provide a proper value for horizontal force at point C.
I recommend creating an orthogonal coordinate system (X-Y axes) with the same orientation of the two forces in the problem.
Disregard the shape and angles of the object, just consider it a disc that pivots around point B.
Then, compute all the forces and moments around the pivot point, considering that the object is in equilibrium.
 

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