Activity for gmcgathâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #285294 |
This isn't a physics question, except in the sense that all questions about physical objects are. (more) |
— | over 2 years ago |
| Comment | Post #285238 |
That's helpful. It clicked after realizing that tossing a ball into the air and having it slowed by gravity is the same as braking, just rotated 90 degrees. (more) |
— | over 2 years ago |
| Comment | Post #285233 |
Thanks, and I'm sure that makes it intuitive to a physicist, but it's not quite what I was hoping for. Something like the discussion of the effects of a collision vs. the velocity going into it might provide more of a feeling for why kinetic energy is proportional to the square of the velocity. (more) |
— | over 2 years ago |
| Comment | Post #285193 |
I'm very rusty on this topic, so I'm offering a comment rather than an answer. Feel free to correct anything that looks dumb here.
In special relativity, there is no such thing as a "rest" frame of reference. All non-accelerated frames of reference have equal standing. But the classic Einstein equ... (more) |
— | over 2 years ago |