On: Students break acceleration world record for elect...

[dtgriscom]

If you can only accurately know the position OR the momentum, is acceleration well-defined?

[ben_w → dtgriscom]

Sure, ignore the position, just focus on the rate of change of momentum with respect to time.

[labcomputer → ben_w]

Well, that doesn’t quite work either. Energy and time are also conjugate variables, so there exists an uncertainty relationship between them.

And since you can relate energy to momentum in a well defined way…