Bigger isn't always better—but when it comes to drones, it kind of is.
All you need is a battery, a magnet, and some wires to build your own quasi-fictional submarine drive.
Set up an intersection the wrong way, and an oncoming car can be completely blind to an approaching biker—with fatal consequences.
If you shoot an arrow straight up into the air, could it fall down fast enough to kill you? Physics can tell.
You can't see a giant rolling version of London and not calculate the heck out of it.
Can fast-moving plastic sheets create an invisible wall? Maybe, maybe not. But you can definitely explore the electric effects of plastic on your own.
Let's calculate how much energy your LEDs suck up relative to old-school incandescents.
Thermoelectric generators with no moving parts are small and reliable—which makes them perfect for spacecraft like Voyager and Cassini.
This crazy parkour move, where a guy bounds up between two walls by jumping from one to the other, is based on the momentum principle and friction.
The spring inside a clicky pen is a perfect way to learn about projectile motion.