A New Twist on an Old Problem I

Physics and Mathematics Extension students are taught that, provided resistance forces are neglected, an object released from rest undergoes the same vertical displacement in the same time interval as an object projected horizontally. Now let resistance forces be included. Would it ever be possible for the horizontally projected object to have a greater vertical displacement in the same time interval than the object released from rest?

Einstein's Happiest Thought

A common phrase often seen in textbooks is "Einstein's greatest blunder". Many Physics and Mathematics students are not aware of "Einstein's happiest thought". What was it?

In 1907 Albert Einstein was sitting in his patent office in Bern Switzerland when he had what he later described as “the happiest moment of my life”-that a person who falls freely under gravity feels weightless.
— From the Einstein Display at the Science Museum London, December 2015