- #1

- 1

- 0

## Homework Statement

a 200g mass attached to a horizontal spring oscillates at a frequency of 2.0 Hz. At t=0s, the mass is at x=5.0 cm and has v=-30 cm/s. Determine:

a) period

b)angular frequency

c) AMPLITUDE

## Homework Equations

x(t)=Acos(wt+psi)

v(t)=-Awsin(wt+psi)

w=2*pi*f

T=1/f

## The Attempt at a Solution

I have solved for the period=1/2 s

I have also solved for angular frequency=2*pi*2=4*pi

However, I am confused about solving for amplitude. I thought that I could plug in 0.05 m and 0s to the x(t) formula, but I do not know psi (phase constant) so I am stuck.