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- Homework Statement
- The uniform bar is bent in the form of a parabola and has a weight per unit length of 6 lb>ft. parabola and has a weight per unit length of 6 lb>ft. Determine the reactions at the fixed support A.

- Relevant Equations
- ## dL=\sqrt{\left(\frac{dx}{dy}\right)^2+1}dy ##

## \overline{x}=\frac{\int _{ }^{ }\tilde{x}dL}{\int _{ }^{ }dL} ##

My solution is

However can someone explain in detail why

will be equal to the weight? and why does it have to be multiplied by 6?