One of Newton's Laws of Motion states that if the forces acting on an object are balanced, then the object will maintain a constant speed of travel. For example, if friction and air resistance acting upon a cyclist are equal to the pedaling speed, the cyclist's speed will remain the same. This program explains forces such as lift, air resistance, and gravity, and their effects on skydivers, airplanes, and racing cars. The program also describes how airplanes counter gravity in order to fly.

Originally released by TMW Media Group, 2008. Streaming video file encoded with permission for digital streaming by Infobase on May 08, 2015.

Newton's Laws of Motion (1:47); --Gravity and Air Resistance (2:31); -- Friction and Acceleration (4:30); -- Gravity and Lift (3:38); -- Forces Affect Our Lives (2:25); .