# Principal of Superposition + Maxwell Reciprocal Theorem

peacex

## Homework Statement

http://img412.imageshack.us/img412/4712/abcww1.jpg [Broken]

## Homework Equations

Using Compatibility Equation & Prinicipal of Superpositon to find Reaction force at C.
Using Principal of Superposition and Maxwell Reciprocal Theorem, to find out Reaction force at C. State experiment procedures.

## The Attempt at a Solution

I know there are 3 unknown forces Ra,Rb and Rc. and only 2 equilibirum equations of Rotational and Vertical/Horizontal. But ive no idea how to attempt to find the compatibility equation, any tips? I know that principal of superpostion means that when u clamp 1 side and put 2 different forces with 2 different deflections, u add them up and that is the defelection for the force added from the 2 difference forces. But how am i suppose to find the reaction force at C when the sides are not even clamped?

Help help help! i really dont know where to start with and how to solve this problem. any tips will be greatly appreicated.

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## Answers and Replies

Homework Helper
Are you familiar with the force method? There is a tutorial on it in the Math & Science Tutorials section.

peacex
Are you familiar with the force method? There is a tutorial on it in the Math & Science Tutorials section.

thanks for replying. may i know where is the tutorial? i cant seem to find it. Do you mind eleborating on the force method? Thanks =)