The period of vibration of the system shown is observed to be 0.2 s. After the spring of c...

The period of vibration of the system shown is observed to be 0.2 s. After the spring of constant k2 = 20 lb/in. is removed and block A is connected to the spring of constant k1, the period is observed to be 0.12 s. Determine (a) the constant k1 of the remaining spring, (b) the weight of block A.

Fig. P19.23