Meter per second (m/s)
The meter per second, symbolized as m/s, is the SI unit for speed, representing the distance an object travels in one second. It was introduced alongside the meter in the late 18th century as part of the metric system and has since become the standard unit of measurement in physics, engineering, and scientific research. Using meters per second ensures consistent, precise, and universal speed measurements, crucial in fields such as mechanics, astronomy, and transportation planning. This unit is widely used in scientific literature, high-speed calculations, and international engineering projects, providing a clear metric reference point for motion.
Mile per hour (mph)
The mile per hour, symbolized as mph, is an imperial unit that expresses speed in miles traveled per hour. It originated in England, where miles were the standard measure of distance, and gained prominence with the advent of road travel and railways. One mph equals 1.60934 kilometers per hour. The unit remains widely used in the United States, the UK, and a few other countries for road speed limits, automotive specifications, and aviation. Despite global metric adoption, mph persists in daily life and transportation, reflecting historical continuity and practical familiarity in imperial-system countries.