Hi everyone, I'm planning a simple experiment for my school, which involves fixing a mass M onto a rod of length L made of a copper alloy. Suppose I drive it capacitively, how do I find the resonant frequency of this simple oscillator? I need its resonant frequency to be about 400-500Hz, which would depend on it's geometry. I know its: -modulus of elasticity -density -Shear modulus -torsion constant I have found that the force varies on sin2(ωt), so the drive frequency of the oscillator is the drive frequency of the voltage. I know that at resonance, the amplitude is approxiamtely ≈ Q(τ/k) but what I need to find is its resonant frequency.