What is the amplitude of an oscillating spring with a 185g mass at 5.2Hz?

hopperd
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Homework Statement


a 185g mass attached to a horizontal spring oscilates at 5.2Hz. At t=0s, the amss is at x=5.80 and has a vx=-40.0cm. determine the amplitude


Homework Equations





The Attempt at a Solution

 
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welcome to pf!

hi hopperd! welcome to pf! :wink:

it's shm, so write a differential equation, and solve it with the given initial conditions …

what do you get? :smile:​
 
Thanks,
Thats the problem. I have tried 3 diff equations, and get the same answer, but it's the wrong one. So I must be missing something. What equation would you use?
 
hi hopperd! :wink:

show us your full calculations, and the official answer, and then we'll see what went wrong, and we'll know how to help! :smile:
 
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