- #1
whitejac
- 169
- 0
Homework Statement
Homework Equations
The equations are all given
The Attempt at a Solution
This isn't really a homework question... it's solved, but I'm having a hard time following it. I don't understand where the first term:
-a(kaθ)
comes from. I can see it's the moment relation between the hinge and the spring but why is the a term squared?