Classroom Aid - Galilean Transformations xx

[WideCuriosity]

Excellent. Just what I was looking for. A simple refresher of the situation, avoiding matrices or equations. Just animation and explanatory graph. (Now I can return to the thing I was reading, that assumed I was still au fait with this bit ;-) ) Works for most real world situations; I don't find myself travelling at near light speeds too often :-)

[Karthikeya_patnala]

This is the best video about Galilean transformation thank you, sir!

[wadehowlettson]

Whoever made it here from watching StarTalk, this is your button

[ThomasJr]

*The universe is fascinating. I believe there must be an advanced civilization somewhere out there in the Universe that has the privilege of traveling through outer space using their spacecrafts and watching in awe the wonders of the Universe.*

[KryptonitePhysics]

What about a point on a rotation, in both reference frames, a mass on a rotation translating at a constant of one reference frame, the observers see
Outside: Changing acceleration of point / mass along x
In: will see no acceleration along of mass x
In both cases you see acceleration the same just due to rotation. then add the constant rate of translation.
Calculations change
But you have no change for a mass

[davidlewis]

Not a criticism at all but I would benefit more if it was briefly mentioned v < v' + vb instead of v = v' + vb because, if this (very) tiny discrepancy is not side-noted upfront then it snowballs later when I deal with Lorentz transformations.

The whole point to keep in mind is that, although Galilean transformations are close approximations under scenarios outlined in this lesson, they're not approximations in ALL cases. Sometimes they are exact, and one needs to know which transformation to apply in which situation. Have seen relativity professors come to grief ignoring this distinction.

[srockerrr]

Excellent video. Thank you so much sir!

[yamnagirl]

Thanks a lot sir.
Very good illustration.

[mukulsingla]

So this was the Galilean coordinate was it?

[owenmartin]

The man on train moves at 2.8 metres, ie the speed of the train. Doesn't matter what his own movements are, you can't add together an absolute speed of 2.8 and a relative speed of 0.6.

[phenomenalphysics]

5:44 hell how can something ever travel faster than the speed of light😲😰😰😨😧 I don't believe this. This is totally wrong! if this was right you'd totally changed the theory of relativity😵

[lowersaxon]

Now suppose the person on the wagon fires a gun ( bullet). Nothing different to light. The man himself is transported, his ball he kicked is but not things flying freely through the air. Regardless if you fire from a train or at rest, the bullets v has nothing to do with the wagon and its speed. Same for light of course. But physicists like to argue that your bullet will be faster if you fire your gun while running rather than standing still. I will never buy that, it’s utter nonsense and therefore there is nothing special with light. It’s the light myth since Michelson-Morley.