I am sorry I had a physics exam today (not written but the other one -- "A+" english) and the whole day was a circus but I am glad to report I passed the exam.
I will be reading your instructions very slow and detailed BvU I just need some rest :)
A professor on youtube set his y0 this way http://prntscr.com/4kqerq
But, if I understand correctly, the equilibrium point should be the point where the acceleration of the mass is 0?
How can I simply change the equilibrium point to my liking?
EDIT: if someone wants reference on which video...
Homework Statement
I am trying to derive the formula for simple harmonic motion of a mass hanging on a spring.
I understand the derivation for the situation when the mass and the spring are on an horizontal table. Then I go about deriving the same formula for the situation when a mass is...