Engineering Statics

E-6


The 20 inch by 20 inch square plate shown weighs 56 pounds and is supported by three vertical wires. Determine the tension in each wire.

This problem can be solved by taking moments about lines 
so that each equation only has one unknown.  Alternately, 
three equation in the three unknowns can be written and 
the calculator used to solve them. 
The first equation is the moment equation about the 
x-axis through the center of the plate.
The second equation is the moment equation about the 
z-axis through the center of the plate.
The force equation is written in the y direction.
The three equations are solved simultaneouly on the 
calculator.