Thevenin Equivalent breaks any circuit into one voltage source and one resistor.
You get the 2ohm resistance on the right because you calculated the equivalent resistance in Figure 4 by removing the current source and acting like the voltage source is just a straight wire.
This will give you...
Homework Statement
What is the maximum normal stress in the beam and where is it located? The beam is 1m long, 0.2m high, and 0.05m thick (out of the page). The Modulus of Elasticity is 100Gp. The force is applied at an angle of 20 degrees with horizontal.
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