Problem B-8-8 A mass of 20 kg is supported by a spring and damper as shown...

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Problem B-8-8 A mass of 20 kg is supported by a spring and damper as shown in Figure 8-28(a). The sys- tem is at rest for / <0. At t = 0, a mass of 2 kg is added to the 20-kg mass. The system vibrates as shown in Figure 8-28(b). Determine the spring constant k and the viscous- friction coefficient b. [Note that (0.02/0.08) x 100 = 25% maximum overshoot corre- sponds to =0.4.] Problem B-8-8 A mass of 20 kg is supported by a spring and damper as shown in Figure 8-28(a). The sys- tem is at rest for / <0. At t = 0, a mass of 2 kg is added to the 20-kg mass. The system vibrates as shown in Figure 8-28(b). Determine the spring constant k and the viscous- friction coefficient b. [Note that (0.02/0.08) x 100 = 25% maximum overshoot corre- sponds to =0.4.]

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