Rectilinear motion might sound like an oxymoron of sorts, but it refers to back-and-forth motion along a straight path. It's the same type of motion Luke and Vadar experienced awkwardly when they rode an elevator together back in Return of the Jedi. We can track this motion using a position function and use it to find both an average and an instantaneous velocity. Duration: 6:20

On Example 8, we exam the physics of diving by specifically finding the time it takes a diver to reach the water and their instantaneous velocity upon impact. Duration: 14:03

What does it mean when your instantaneous velocity is negative? We look to a classic NES controller for clues, then discuss the curious reason speedometers do not have negative numbers. Duration: 2:56