Top 10 Most Expensive Military Planes - Photo Essays
B-2 Spirit stealth bomber of the USAF. Stealth aircraft are designed to avoid detection using a variety of advanced technologies that reduce reflection/emission of radar, infrared, visible light, radio-frequency (RF) spectrum, and audio, collectively known as stealth technology. Development of stealth technology likely began in Germany during World War II. Well-known modern examples of stealth aircraft include the F-117 Nighthawk, the B-2 Spirit, the F-22 Raptor,and the F-35 Lightning II.
Angular velocity: the velocity with which an object is moving around a fixed axis of rotation (this is different from ordinary velocity!); different points on a rotating rigid body move different distances in a given time interval, depending on how far the point lies from the axis; but, because the body is rigid, all points rotate through the same angle in the same time; at any instant, every part of a rotating body has the same angular velocity (rad/s); linear velocity = r x alpha