2. Force, pressure, and acceleration sensor. A force sensor is built as a capacitor with one plate fixed while the other can move against a spring with constant k [N/m]. By pressing on the movable plate, the distance the plate moves is directly proportional to the force. The plates have an area S and are separated by a distance d. The permittivity of the material between the plates is that of free space. Using Figure 2, and assuming the plate has moved a distance x from the rest position:a. Find the relation between measured force and the capacitance of the sensor.b. Plot a calibration curve for the following values: k = 5 N/m, S = 1 cm2, d = 0.02 mm.c. How can this device be used to measure pressure? Calculate the relation between pressure and capacitance.d. How can this device be used to measure acceleration? Calculate the relation between acceleration and capacitance. Assume the mass of each plate is m [kg] and that the mass of the spring is negligible.
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