Welcome to Fun with Fundamentals, a series of technical puzzles designed to refresh your knowledge of fundamental concepts in engineering.

Try the first puzzle.

Wildly popular in print, we're now presenting the series online. These problems will test and educate you on key concepts in physics, statics, dynamics, trigonometry, and calculus. Try your hand at these puzzlers, and you just might remember a thing or two from all that basics of engineering tucked away in the remote recesses of your brain.

We'll be posting several new problems every week. After the first dozen or so puzzles, we'll ask you to register or log into the Machine Design website to see the puzzle answers. Registration is free, quick, and relatively painless.