Length, in meters, divided by time, in seconds {meters/second}, is velocity {speed measurement}. In English measure, velocity is miles per hour (mph) or nautical miles per hour {knot, speed}. Velocity divided by time, in seconds {meters/second squared}, is acceleration. Earth-gravity acceleration is 9.8 m/s^2. Car acceleration is 3 m/s^2 or 1/3 gravity.
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Date Modified: 2022.0224