Rollercoasters: You've all probably been on at least one. There's Paramount Canada's Wonderland (the amusement park I go to, because I'm Canadian!), Six Flags, The Exhibition . . . wherever you go, you can be sure to find a gravity-defying coaster.
So how does a line of little carts moving on tracks create this adrenaline-pumping, exciting ride?
First of all, coasters move because of gravity and inertia.