What is the SI unit for acceleration?

The SI unit for acceleration is indeed meters per second squared, represented as m/s². This unit describes how the velocity of an object changes over time. Specifically, acceleration measures the rate at which an object's speed increases or decreases in a given time frame. The "meters" in the unit indicate the distance traveled, while "seconds squared" signifies that this change in speed is being assessed over time, specifically for every second of movement.

Understanding this concept is crucial in fields related to physics and engineering, as it applies to various systems, including machinery and vehicles, where acceleration plays a key role in performance analysis and safety considerations. The other units mentioned do not adequately describe acceleration: meters per second (m/s) measures speed, meters per second cubed (m/s³) would suggest a rate of change of acceleration, and kilometers per hour (km/h) is a unit of speed.