# SHM equation velocity of wave help

1. Apr 8, 2017

1. The problem statement, all variables and given/known data

2. Relevant equations
x(t) = A cos (2pi * f * t)
v (t) = - vmax sin (2pi * f * t)

vmax = (sqrt of k/m) * A
v = circumference/period
3. The attempt at a solution
I do not know how to find the velocity as question only provides amplitude and i dont know how to find period using the values in the bracket. .

I would like help in the right direction

Last edited by a moderator: Apr 8, 2017
2. Apr 8, 2017

### Staff: Mentor

Welcome to Physics Forums.

You need to do a bit of research on the traveling wave equation. I suggest a web search on "traveling wave parameters" (hint: The Hyperphysics web site entry provides a pretty good, compact summary).

All the information you need is in the argument of the cosine function if you think about what is required for one full cycle of the wave to occur when either of the two parameters (x or t) is held constant while the other is allowed to vary.

3. Apr 8, 2017