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* Trampoline vibration When a 60-kg boy sits at rest on a trampoline. it sags 0.10 m at the center (a) what is the effective spring constant for the trampoline? (b) The trampoline is pulled downward an extra 0.050 m by a strap sewed under the center of the trampoline. When the strap is released. what are the energy and frequency of the boy-trampoline system? What assumptions did you make?
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