Howard Brody, emeritus professor of physics at the University of Pennsylvania, serves up an answer to this question. Tennis can be played on almost any surface that can be made smooth enough to ...

Let’s ignore air resistance for a second. If you point a cannon, aim an arrow or throw a basketball, the trajectory that gets you furthest will be at 45 degrees to the vertical. So the same must be ...

Which long jumpers will leave the London Games with a medal and which with just a memory depends, of course, on the horizontal distance they cover. Paradoxically, however, vertical velocity (the speed ...