Phase Difference IB Physics

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Well illustrated except you equated the symbol "phi" to different quantities, on the same page. (4:55)

Also, at (0:20) a load oscillating suspended on a spring is technically not a SHM. By definition, SHM must have force proportional to the negative of its displacement. But in this system, there is a constant force due to gravity on the load. The force on the load is -kx + mg. The force on the load is never zero at equilibrium point.

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Great video. Is it even worth doing Physics IB HL. Im struggling a lot rn. With Fields especially. Any tips or mini pep talks?  😅

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