Originally Posted by

**thomas49th** Hi, I'm not very good at my mechanics, notably simple harmonic motion. I have been given this question:

A particle P moves with simple harmonic motion and comes to rest at two points A and B which are 0.24m apart on a horizontal line. The time for P to travel from A to B is 1.5s.

The midpoint of AB is O. At time t = 0, P is moving through O, towards A, with speed u m/s

a) Find the value of u

b) Find the distance of P from B when t = 2s

c) Find the speed of P with t = 2s

OKAY

So

a) I know T = 2pi/w, as it takes 1.5s to go from A to B, that means T=3

Therefore w = 2pi/3

I know v² = w²(a²-x²)

but I don't know how that helps?