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March 30, 2015

March 30, 2015

Posted by **Kyle** on Saturday, December 3, 2011 at 8:23pm.

(a) What is the frequency of the wave?

(b) What is the wavelength of the wave?

(c) Give the general equation giving the transverse displacement of the particles of the string as a function of position and time.

(d) Calculate the tension in the string.

- Physics -
**Damon**, Saturday, December 3, 2011 at 8:49pmUnless you have a typo, sin[1.5 - (3.0 s-1)t] is really sin[1.5 - 2t]

when is 2 t equal to 2 pi ?? (that is when the argument of the sin function changes by 2 pi, a period)

That is when t increases by pi

so the period, T is pi

the frequency = 1/pi

wavelength is how far it goes in pi seconds

That is 30 * pi

y = (5.0 cm) sin[1.5 - 2t] sin (2 pi x/L - phi)

where L is that wavelength

get the phase angle phi from the value of y when x = 15 and t = 0

you have the speed of the wave c = L/T

You know the equation for speed of the wave versus tension and density, so calculate the tension.

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