- #1

jvick717

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**Finding amplitude? SHM problem**

## Homework Statement

A 245 g mass attached to a horizontal spring oscillates at a frequency of 3.70 Hz. At t =0s, the mass is at x= 4.40 cm and has v_x = -25.0 cm/s.

Determine:

## Homework Equations

I got the first two

The Period= .27027 s

The Angular Frequency= 23.248 rad/s

The Amplitude=? m rounded to 5 sig figs

The Phase Constant=? rad rounded to 5 sig figs

## The Attempt at a Solution

I tried using the equation (x)t=Acos([tex]\omega[/tex]t+[tex]\phi[/tex])

and plugged in t=0 and .0440m for x(0) so the answer i got was .0440m but this is wrong. and i can't attempt the phase constant yet because i need the Amplitude for that. Any help is appreciated thanks.