1. The problem statement, all variables and given/known data I'm struggling with this, I have series of data for the deflection of a cantilever beam and the corresponding output voltages from a strain gauge, wheatstone bridge and amplifier circuit. I'm trying to find the relation between voltage output and force, i.e. Force = K x voltage (K = constant) but I don't have the force. 2. Relevant equations Also I've been given the equation for Bending moment M = F * Length at gauge Stress on top surface of beam σ= d/2 * M/1 Output voltage = R2/R* Vs* Kg *ε Where Kg = guage factor 3. The attempt at a solution I think Force can be found from 3EId /L^3 , where d = deflection, E= youngs modulus, I = 2nd moment of area. But still think I'm missing something. I've already found another constant for output voltage = K x deflection, if that is relevant. Using 3EI/L^3, I get 5171.3 which can then be multiplied by deflection to give the Force - not sure if this is correct? Hoping someone has done a similar experiment before and can help in some way please?