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a damped harmonic oscillator involves a block (m=2kg) ,a spring (k=10N/m)and a damping force F=-rv. Initially it oscillates with an amplitude of 0,5 m; because of the damping, the amplitude falls to three fourths of its initial value after five complete cycles.

(a) What is the value of b?

(b) How much energy is lost during these five cycles?

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