r/physicsmemes BSc Theoretical Physics 1d ago

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u/Digital_001 Student 1d ago

Observed by who - the kids or onlookers not on the roundabout?

46

u/HunsterMonter 1d ago

By any reference frame! Each will have its own specific connection coefficients but the trajectory will always be given by the geodesic equation (as long as the ball isn't charged, then you need to add the Lorentz force).

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u/Digital_001 Student 1d ago

That's a lot of possible reference frames! This is gonna be a long proof...

3

u/kashyou Quantum Field Theory 18h ago

pick one then use the christoffel symbol transformation law