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A 6.0-kg object oscillates on a spring with a force constant of 160 N/m. The damping coefficient is 0.20 kg/s. The system is driven by a sinusoidal force of maximum value 55 N and the angular frequency is 20 rad/s.

(a) What is the amplitude of the oscillations?

(b) If the driving frequency is varied, at what frequency will resonance occur?

rad/s

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