7 thoughts on “3.6”

    1. Sorry for only just now approving your comments... I don't check my email very often these days. As noted by the rsraggies, the equilibrium video linked above explains that the initial stretch in the spring (which accounts for the equilibrium position being different from the unstretched position) offsets the weight of the object, thus gravitation potential has been offset by an equal amount of mechanical potential energy thus both can safely be omitted from the calculations.

  1. i still do not understand why we don't consider the gravitational potential energy? You said we are measuring the system from the equilibrium position so we don't consider GPE, but what does that mean exactly? isn't this mass moving up a distance x on the incline? so wouldn't that mean the GPE = mg*xsin(alpha)?

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Tutoring for Statics, Dynamics, and Controls courses at Texas A&M