Question

(14%) Problem 7: A suspension bridge oscillates with an effective force constant of 1.1 × 108 N/m. ▲ 50% P t (a) How much energy, in joules, is needed to make it oscillate with an anplitude of 0.095 m? ▲ 50% Part (b) If soldiers march across the bridge with a cadence equal to the bridge's natural frequency nd mpart a 95 x 104 J of energy to the bridge's oscillation each second, how long, in seconds, does it take for the bridge's oscillations to go from an amplitude of 0.095 m to 0.S1S In

Answer 1

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