- #1
david22
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I have doubts of how can I put my frame of reference in a simple harmonic motion vertical spring. Normally the books choose the origin in the equilibrium position and the positive distance (x>0) downward, and in this conditions Newton´s second law is: ma=-kx; but instead of putting the positive distance downward I want to put it upward, so the negative distance (x<0) is downward and in this conditions Hook´s law is going to be positive(because positive direction is upward) so Newton´s second law is: ma=kx
I want you to tell me if the last expression is correct for the negative distance downward. I would appreciate your help
I want you to tell me if the last expression is correct for the negative distance downward. I would appreciate your help