Trevor+Kupecky

= = Pilot Ejects From Jet at Mach 2

Speed
This jet is **supersonic** and is traveling a speed faster than the speed of sound (Mach 1). In this case, the jet is traveling twice the sound of speed at Mach 2. The speed of sound varies, so a certain Mach speed at sea level would be faster than what it would be at 30,000 feet. So, Mach 2 at sea level is a greater miles per hour and Mach 2 is at 30,000 feet. The speed of sound is **about 761.2 mph** in the earth's atmosphere at sea level. This jet was traveling over twice that speed!

Sound
Sound is a mechanical wave that is a oscillation of pressure transmitted through a gas, liquid, or solid. The speed of sound varies in different temperatures and levels in the atmosphere. Since the jet is speeding at Mach 2, it has **"broken the sound barrier"**. When an aircraft breaks the sound barrier, or traveled faster than sound, a while halo around the aircraft forms from water droplets due to a drop in air pressure around the aircraft. The jet is traveling twice the speed of sound, so this effect has already happened. the jet has passed through its sound waves due to the doppler effect. the doppler effect is the change in frequency for an observer moving relative to the source of the wave. **<-- Mach 1** **<-- Mach 2**

Force
G forces is a numerical ratio of any applied force to the gravitational force at the earth's surface. In a jet, **G forces** are basically the force of acceleration pulling on you when change the plane of motion. The force of gravity when a human is still is considered to be 1 G. A human can survive a range of about 100 G for an just an instant. But, if a human withstands a G force of around 9 or 10 G for a period of time they could die or have serious injuries. This is because your body will like it weighs ten times what it does due to the force of gravity. Jets travel at about 9 G. the only reason that the pilot in this picture is able to survive the G force at Mach 2, is because of a special suit all jet pilots wear so that the G force felt by their body is decreased.

Physics Topic Categories- Speed, Sound, Force

References- July 2009. Web. 13 Dec. 2011. . ||
 * < "Russian Pilot Ejecting From Plane At Mach 2." //Geekologie//. Anticlown Media, 28

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in Russia." //Sky and Space Travel//. Go Russia, 2011. Web. 12 Dec. 2011. . ||
 * < Curtis, Martin. "Speed and G-force - supersonic flights on military fighters MiG

Web. 12 Dec. 2011. . ||
 * < Russel, Daniel A. "The Doppler Effect and Sonic Booms." //Kettering//. N.p., 2011.

NASA, 2011. Web. 12 Dec. 2011. . ||
 * < "The Speed of Sound and Mach Numbers." //U.S. Centennial of Flight Comission//.