Simple Harmonic Motion pulsatance Question

[gedanken6]

Homework Statement

A particle oscillates with an s.h.m of amplitude 50mm and a maximum speed of 0.25 m/s. Calculate the pulsatance, period and maximum acceleration

Homework Equations

x = a sin(wt)
dx/dt=awcos(wt)
d2x/dt2=aw^2sin(wt)
Put in x=0.05sin(wt)
0.25=0.05wcos(wt)
0=0.05w^2sin(wt)

The Attempt at a Solution

Put in x=0.05sin(wt)
0.25=0.05wcos(wt)
0=0.05w^2sin(wt)

Got 0 = wtan(wt)
Think I'm on the wrong track

 

[tiny-tim]

hi gedanken6!

(have an omega: ω and try using the X² tag just above the Reply box )

so what is a?

and what is ω?