A mass of 20g suspended from a vertical spring, assume hat the energy of the system is conserved, find the spring's constant (k) if the mass dropped from the equilibrium and the maximum elongation(äJlbiwl) is 7.5cm. (Let g=10m/s?) 2.7N/m 10.0N/m 24.5N/m 5.3N/m 32.0N/m O O
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