The Mean Speed Theorem

Did you know students at Oxford in 1335 were solving problems about objects moving with constant acceleration? This blew my mind.

Medieval scientists were deeply confused about the connection between force and velocity: it took Newton to realize force is proportional to acceleration. But in the early 1300s, a group of researchers called the Oxford Calculators made huge progress in understanding objects that move with changing velocity. That was an incredibly important step.

You see, Aristo...