1. An accelerometer consisting of an elastic element and a potentiometric displacement sensor has to meet the following specification: Input range 0 to 5g Output range =0 to 10 V Natural frequency 10 Hz Damping ratio = 0.8 Maximum non-linearity = 2% off.s.d. Seismic mass = 0.005 kg a. Calculate the required spring stiffness and damping constant. b. What should the input displacement range of the potentiometer be? (g = 9.81 ms ?) c. If the accelerometer is to be used with a recorder of 10 k2 resistance, what is the maximum allowable potentiometer resistance?

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