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September 1, 2014

Homework Help: Physics

Posted by Me on Wednesday, January 26, 2011 at 3:31pm.

Hello, I have e problems with dis question

A harmonic wave on a string moves along the x-axis according to:

(x,t) =5.0 (cm) sin[ (2.5m^-1) x - (63s^-1) t ]

At x = 1.0 m when t = 2.2 s the speed of the oscilations on the string is closest to ...


me thought that you can just plug-in the x=1 and t=2.2 to get the displacement, and then use v=d/t.

but it no work

the opinions are,


2.27 m/s
1.67 m/s
and
4.55 m/s

thank.

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