(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

This is a question from a test i had today..i wanna know if I did it right or not.

A mass on a spring with spring constant 700 N/m is compressed 16 cm. If the maximum value of the speed is 12 m/s, what is the mass of the mass in kg?

2. Relevant equations

Ep = 1/2kx^2, Ek = 1/2mv^2

3. The attempt at a solution

so conservation of energy plays a role in this...

Vmax = 12 m/s

k = 700 N/m

x = 0.16 m

m = ?

Ep = Ek

1/2kx^2 = 1/2mv^2

m = (1/2kx^2) / (1/2v^2)

m = 0.12 kg.

im really doubting myself right now.

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# Homework Help: Physics 20-1: Energy

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