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**1. Homework Statement**

A particle is oscillating in simple harmonic motion with period 4.5 ms and amplitude 3.0 cm. At time t = 0, the particle is at the equilibrium position. Calculate, for this particle:

a) frequency

b) the angular frequency

c) the maximum speed

d) the maximum acceleration

e) the speed at time t = 1.0 ms

**2. Homework Equations**

None

**3. The Attempt at a Solution**

a) 220 Hz

b) 1.4 x 10^3 rad/s

c) 42 m/s

d) 5.9 x 10^4 m/s^2

I am stuck at (e) and just don't know how to do this.

I was thinking to use the Instantaneous Velocity formula (Vins = omega {square root[(amplitude)^2 - (displacement)^2]} but that isn't giving me the correct answer.

Thanks for your help in advance!