Here's why:
* Speed: Supersonic jets are designed to break the sound barrier (767 MPH) and travel at speeds significantly higher than conventional aircraft.
* Ground Level: While supersonic jets typically fly at much higher altitudes, they need to accelerate and decelerate at ground level during takeoff and landing.
However, it's important to note that other things could potentially reach speeds close to 700 MPH at ground level, though they are less likely:
* High-speed trains: Some high-speed trains, like the Japanese Shinkansen, can reach speeds exceeding 300 MPH. While this is significantly less than 700 MPH, advancements in train technology may lead to faster trains in the future.
* Experimental vehicles: Certain experimental vehicles, like the Bloodhound SSC, are designed for land speed records, which could potentially reach speeds near or exceeding 700 MPH.
It's worth remembering that these scenarios are more theoretical and less common than a supersonic jet.
