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**[SOLVED] Manipulating a formula**

## Homework Statement

"An instructor sets up an oscillating vertical mass-spring system (k=6.05 N/m). The maximum displacement is 81.7 cm and the maximum speed is 2.05 m/s. What is the mass of the oscillator?

Answer: 0.961kg

## Homework Equations

vmax=A*the square root of k/m

(maximum speed of a mass-spring system)

## The Attempt at a Solution

Well, I probably could solve this, if only I could manipulate the formula for m. I've tried m = the square root of V*A divide by k squared (sorry, I don't know how to use symbols) and other similar manipulations, but it just doesn't work for me. Note: I am a complete "n00b" at physics and am doing practice problems to improve.