The base unit for acceleration in the SI system is...

The base unit for acceleration in the International System of Units (SI) is defined as metre per second squared (m/s²). This unit indicates how much the velocity of an object changes (in metres per second) for each second of time. Acceleration measures the rate at which an object speeds up or slows down.

Using this unit, if an object's velocity increases by 10 metres per second every second, its acceleration is 10 m/s². This reflects a fundamental relationship in physics, where time is an essential factor in calculating how motion changes.

Other options such as metre/hour², metre/minute², and metre/day² are not standard units for acceleration in SI. They represent similar concepts but utilize different time intervals for measurement, leading to varying interpretations of acceleration. Hence, the unit of metre/second² is the universally accepted and scientifically accurate representation of acceleration in the SI system.