Rhett Allain

Feb 26, 2021

5 min read

This Is the Definition of Velocity That You Should Use In Physics

Photo: Rhett Allain

If you are teaching or using physics, please DO NOT use this definition for the velocity in one dimension (it’s a bad idea):

“Velocity = distance divided by time.”

OK, technically there are some cases where this would be fine — but it leads to the really terrible version of velocity that looks like this: