Solving Beam & Magnitude Reactions - 25kg Beam

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Homework Help Overview

The problem involves a uniform beam supported by a roller and a pin, with specified forces acting on it. The original poster seeks to determine the reaction forces at the supports given the beam's mass and the applied forces.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the reaction forces using equilibrium equations but expresses uncertainty about their approach and the correctness of their answers. Other participants question the absence of a referenced figure, which may be crucial for understanding the problem setup.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the problem's context due to the missing figure. The original poster has acknowledged confusion regarding their calculations and has referenced a similar question in another forum for additional context.

Contextual Notes

There is mention of an attached figure that is not visible in the current thread, which may impact the ability to fully understand the problem. The original poster has also indicated that they have received incorrect feedback on their calculated values.

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Homework Statement



As shown, a roller at point A and a pin at point B support a uniform beam that has a mass 25.0 kg . The beam is subjected to the forces f1 = 50.0N and f2= 79.0N . The dimensions are l1= 0.750m and l2= 2.30m . (Figure 2) What are the magnitudes and of the reaction forces and at points A and B, respectively? The beam's height and width are negligible.

Please see attachment for figure.


Homework Equations





The Attempt at a Solution



(79*cos(15)*3.05)+(50*0.75) = Rb *3.05
Rb=88.6

Ra * sin(53.13010)*3.05 = 50*2.3
Ra=47.1311

I am not sure if this is how you do this type of question..?
Also the answers are not correct as when I go to see if they are correct they come back as incorrect. The ansers i have tryed which are incorrect are, Fa = 47.1 Fb=88.6
 
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Uh ... what attached figure is that ?
 
wilson11 said:

Homework Statement



As shown, a roller at point A and a pin at point B support a uniform beam that has a mass 25.0 kg . The beam is subjected to the forces f1 = 50.0N and f2= 79.0N . The dimensions are l1= 0.750m and l2= 2.30m . (Figure 2) What are the magnitudes and of the reaction forces and at points A and B, respectively? The beam's height and width are negligible.

Please see attachment for figure.

Homework Equations



The Attempt at a Solution



(79*cos(15)*3.05)+(50*0.75) = Rb *3.05
Rb=88.6

Ra * sin(53.13010)*3.05 = 50*2.3
Ra=47.1311

I am not sure if this is how you do this type of question..?
Also the answers are not correct as when I go to see if they are correct they come back as incorrect. The answers i have tryed which are incorrect are, Fa = 47.1 Fb=88.6
There is no attached figure.
 
It says that I have already uploaded the image. I have also posted this question in a different forum. Can you please have a look at this one.

https://www.physicsforums.com/showthread.php?t=637033

Above is the same question with figure.

Sorry for the confustion.

Thanks
 

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