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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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

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 /

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