Building Your First High-Speed Cannonball Track
Setting up a cannonball track in your hallway is one of those projects that starts small and somehow takes over your entire afternoon. You start out just wanting to see how fast a little die-cast car can go, and before you know it, you're raiding the recycling bin for cardboard supports and using every rolls of painter's tape in the house. It's a hobby that bridges the gap between simple childhood fun and genuine physics experiments, though most of us are really just in it for the spectacular crashes at the end. ...