What does m/s represent in the SI system?

In the International System of Units (SI), m/s stands for meters per second, which is a unit of measurement for velocity. Velocity is defined as the rate at which an object changes its position. It includes both speed and direction, indicating not only how fast an object is moving but also the direction of its movement.

The correct answer highlights the importance of understanding units of measurement, particularly in physics and engineering, where precise definitions are essential for effective communication and analysis of motion. Other options represent different physical quantities: acceleration, which measures the rate of change of velocity, is expressed in m/s²; force, defined as mass times acceleration, is measured in newtons (N); and mass itself is measured in kilograms (kg). Therefore, recognizing m/s specifically as the unit for velocity is crucial in the context of this question.