Both masses have acceleration of magnitude a as shown. The interaction force between the masses is represented by a third spring with spring constant 12, which connects the two masses. 0 kg. 00 kg, (b) 200 g. . . . In the system shown in Figure 5-59, the numerical values of rn, b, and k are given as rn 1 kg, b 2 N-secm, and k 100 Nm. .