A large rectangular barge floating on a lake oscillates up and down with a period of 4.5 s. Find the damping constant for the barge, given that its mass is 2.30Ã10^5 kg and that its amplitude of oscillation decreases by a factor of 2.0 in 4.9 minutes.

Respuesta :

Answer:

b = 1084.5 kg/s

Explanation:

As we know that the amplitude of damped oscillation is given as

[tex]A = A_o e^{-\frac{bt}{2m}}[/tex]

here we know that

[tex]A = \frac{A_o}{2}[/tex]

after time t = 4.9 minutes

also we know that

[tex]m = 2.30 \times 10^5 kg[/tex]

now we will have

[tex]\frac{A_o}{2} = A_o e^{-\frac{bt}{2m}}[/tex]

[tex]\frac{bt}{2m} = ln2[/tex]

[tex]b = \frac{ln2 (2m)}{t}[/tex]

[tex]b = \frac{2(ln2)(2.30 \times 10^5)}{4.9 \times 60}[/tex]

[tex]b = 1084.5 kg/s[/tex]

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