The answer are All A.

hello!

i dont know the first question but for the second one,

KE spring= 1/2 k x^2

so KE spring= 1/2* 1* (0.5)^2

we use 0.5 m because we have to convert it from cm to m.

so in the end the KE spring .125 which is equal to the work

let me know if i did something wrong

hope this helps

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For the first question:

Centripetal Accelaration = w^2 * r

W=6000 rpm *(2Pi/60) = (200*Pi) rad/sec

Ac=(200*pi)^2 * 0.125 ~~ 50,000=5,000g

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