A block of Jello rests on a plate as shown in Fig. 11-58 (which also gives the dimensions of the block). You push it sideways as shown, and then you let go. The Jello springs back and begins to vibrate. In analogy to a mass vibrating on a spring, estimate the frequency of this vibration, given that the shear modulus (Section 9-5) of Jello is 520 N/m2 and its density is 1300 kg/m3.

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4.0 cm 8.0 cm- 8.0 cm