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Discussion Response Post to: wave motion

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22 Aug 2007 23:59:47 IST

Subject: Re:wave motion

swati.07 (852)

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Answer to second question ,

L = length of the rope = 2m , M = mass = 80gm = 0.08 kg

mass per unit length = m = 0.08 / 2

= 0.04 kg/m

Tension , T = 256 N

Velocity , V =

( T/m )

( 25600/4 )

= 80 m/s

For fundamental frequency

I =

= 4L

= 4 * 2 = 8m

f = 80 / 8 = 10 Hz

( a ) Therefore the frequency of 1st two overtones are

1st overtone = 3f = 30 Hz

2nd overtone = 5f = 50 Hz

( b )

= 4I = 4 * 2 = 8m

1 = V / f1 = 80 / 30 = 2.67 m

2 = V / f2 = 80 / 50 = 1.6 m

So, the wavelengths are 8 m, 2.67 m and 1.6 m resp.

this reply: 5 points (with 1 Olaaa!! Perrrfect answer.

in 1 votes ) [?]

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