So that's why we put the positive inside. So we have our single positive force and we add the two negative and we add the two negative forces and then we subtract the two values. So this is step number one. Now, step number two is to actually figure out what these three forces are. Well recall from classical physics that we can represent the centrifugal force as simply. So our centrifugal force is equal to so the red force, F subscript C is equal to the mass of that object, the particle, the blue particle, which is assumed to be m multiplied by its acceleration.