Posted by **TOm** on Wednesday, January 23, 2013 at 10:21pm.

The displacement of a particle in centimeters is given by y=8 sin (2πft).

If f=20 Hz, find the

displacement and the velocity of the particle at a time t=0.01 s and 0.07 s.

(ans: y=7.61 cm, v=3.11 m/s, y=4.70 cm, v= -8.13 m/s)

After I plug in f to get w and switch to this equation: Asin(wt - kx), plugging in the numbers doesn't give me the right answer.

Thank you

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