Torque and Rotational Equilibrium

AI Thread Summary
The discussion focuses on solving torque and rotational equilibrium problems, specifically finding mass, tension, and reaction force on a hinge. The original poster expresses difficulty in determining the required variables despite attempting to sum forces in both the x and y directions. A suggestion is made to sum moments instead, emphasizing that the sum of moments at any point should equal 0 N*m for equilibrium. This approach is crucial for solving the posed questions effectively. Overall, the thread highlights the importance of applying the correct principles of torque and equilibrium in physics problems.
stevesmith
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Hi there,

This is my first time on this great board, I hope I can get some help!

I've tried both of these torque and equilibrium questions, but cannot find the required variable. (I've tried summing forces in the x and y)

Please help!

http://img126.imageshack.us/img126/8610/img0023ob.jpg

1) Find mass

2) Find tension and reaction force on the hinge.

Thanks in advance to everyone.


Steve
 
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Try summing moments. Sum of moments at any point is equal to 0 N*m
 
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