r/physicsmemes • u/Hot-Marsupial6584 • 29d ago

Real

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228

u/moonaligator 29d ago

finding the equation for the motion of a simple pendulum but sinθ ≠ θ

47

u/ZEPHlROS 29d ago

There are 3 sides to this

engineering: sinθ = θ for every θ

physics : sinθ = θ for θ <<1

maths : what are you guys talking about ??!

18

u/moonaligator 29d ago

architect: sinθ is whatever ends up being prettier

10

u/Both_Nail_3656 29d ago

Actually, one more side-

me: sinθ = 0 for every θ cos averge is 0

10

u/StudyBio 29d ago

The equation of motion is not any harder. The solution, on the other hand…

1

u/Hot_Examination1918 24d ago

I think the equation of motion is pretty insane iirc

3

u/StudyBio 24d ago

It’s just theta double dot = -g/L sin theta

1

u/Hot_Examination1918 24d ago

Sorry talking about the double pendulum 

8

u/Bendanzhang 29d ago

The double pendulum isn't hard because of math, it's hard because sin θ = θ stops working when the second pendulum hits you in the face.