What does it mean to go supersonic?
Supersonic describes things that can travel faster than the speed of sound, like the passenger jet Concorde that used to zip from New York to London in under four hours. Anything supersonic is so fast that you see it before you hear it.
How fast is supersonic?
approximately 343.2 m/s
Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h).
