Torque and Rotational Equilibrium

[stevesmith]

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

 

[Dmitri]

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