The choice of units in physics and engineering is based on convention and practicality. The SI (International System of Units) has established the meter per second (m/s) as the standard unit for measuring speed. While it is technically possible to express speed in meters per minute (m/min), there are several reasons why m/s is preferred:
Consistency with other SI units: The SI system aims for consistency and coherence among its units. By using meters per second for speed, it aligns with other units in the system, such as meters for distance and seconds for time. This uniformity simplifies calculations and conversions between different quantities.
Compatibility with equations and formulas: Many fundamental equations in physics, such as those describing motion and dynamics, are formulated using the SI units. When using m/s, these equations become more straightforward and intuitive to apply. Switching to m/min would require modifying these equations, leading to unnecessary complications.
Common usage and familiarity: Meters per second is widely used and recognized across various fields, including science, engineering, and everyday life. It has become the standard unit of speed in most contexts, and people are generally familiar with its meaning. Introducing m/min as an alternative unit could create confusion and hinder effective communication.
Time standardization: The choice of second as the base unit for time is closely tied to the Earth's rotation and atomic timekeeping. The second is defined based on the vibration frequency of a specific atom. This standardization ensures consistency and precision in time measurements, making the second a reliable unit for calculations involving speed.
While m/s is the preferred unit for speed, it's worth noting that different units may be more suitable in specific scenarios. For example, in certain industrial processes or transportation systems, meters per minute might be more relevant and convenient for measuring speed. However, in the broader scientific and engineering contexts, m/s remains the standard unit due to the reasons mentioned above.