Simple Harmonic Motion and Reference Circle

[Pius]

Thank you in advance!

Homework Statement

A 3.0-kg block is between two horizontal springs. Neither spring is trained when the block is at the position labeled x=0 m in the drawing. The block is then displaced a distance of 0.070m from the position where x=0m and is released from rest. (a) What is the speed of the block when it passes back through the x=0 position? (b) Determine the angular frequency w of this system.

Homework Equations

I have no idea.

The Attempt at a Solution

Help me!

 

[danago]

How does angular frequency relate to the frequency of cycles?

 

[Pius]

omega!=2pi/T
7.54*10^4= 2pi*f
f=12006
12006*2.5s= 30016 times?
It says to use three significant digits from start to finish. How do I do that? Sorry, I haven't learned this!
Thanks danago!