A 160g hockey puck swings around on a spring

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A 160g hockey puck swings around on the end of a spring on a frictionless surface. One end of the spring is attached to the hockey puck, and the other is attached to a fixed pivot point. The spring has a constant of 25N/m and an equilibrium length of 1m and stretches a distance of 10com.

a.what is the magnitude of the acceleration of the hockey puck?

b. what is the magnitude of the velocity of the hockey puck?

I have no clue how to approach this question due to the spring. If the spring wasn't a part of it i would have an understanding. please help!
 
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Hmm, this is a strange question. Let me clarify something from you, do you know explicitly that the hockey puck is moving in a circle (as I am about to assume)? If so, the fact that there's a spring makes no difference in terms of centripetal acceleration. You'll have a different tension than if the puck were on a rigid string.
 
To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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