# The equation y(x,t)=acos2πf(xv−t) may be written as y(x,t)=acos[2πλ(x−vt)].

- A) Use the last expression for y(x,t) to find an expression for the transverse velocity vy of a particle in the string on which the wave travels. Express your answer in terms of the variables A, v, λ, x, t, and appropriate constants.
- B) Find the maximum speed of a particle of the string.
- Express your answers in terms of the variables A, v, λ, x, t, and appropriate constants.

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