Sal Khan speaks to race car driver JR Hildebrand about the optimal turns at Indianapolis Motor Speedway. [6:24]

First let's review position, velocity and acceleration vs. time curves. This video [2:56] focuses on developing mathematical formulas to do three things: Describe how particles move, how particles collide, and track particles forward...

A video explaining that terminal velocity exists when the force of gravity equals the force of drag on an object. Video shows how terminal velocity exists in a wind tunnel. [4:08]

This lesson introduces the concept of terminal velocity. It is 2 of 2 in the series titled "Terminal Velocity."

This lesson introduces the concept of terminal velocity. It is 1 of 2 in the series titled "Terminal Velocity."