since the net force expressed in newton's second law is provided by the coulomb force between the charged disks, we can substitute the expression for the coulomb force into newton's second law and solve for the acceleration. what is the algebraic representation of the acceleration of the disc? your answer should be in terms of the charge on disc 1, q1, the charge on disc 2, q2, the distance between them, r, and the mass of a disc, m.