How Do You Calculate Reaction Forces in Equilibrium Problems?

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To calculate reaction forces in equilibrium problems, one must apply the principles of static equilibrium, ensuring that the sum of forces and the sum of moments around a point are both zero. The discussion references a specific exam question, indicating that the answer key suggests a distance of 1.6m, but clarification on the solution is sought. It is noted that when the structure tips, the reaction force at support A will decrease, potentially leading to a complete loss of support if tipping continues. Understanding the distribution of forces and the effects of tipping is crucial for solving these types of problems. Mastery of these concepts is essential for accurately determining reaction forces in various engineering scenarios.
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Hi I got this question from the January 2004 BC Provincial Exam. It's question # 14. I have attached the question and picture. The answer key says B which is 1.6m but what is the solution?
 

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Do you know how to find the reaction force at each of the two supports?

What do you think happens to the reaction at A when it tips?
 
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