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  • Understanding Acceleration: The Role of Time in Velocity Change
    The unit of time enters twice in acceleration because acceleration is defined as the rate of change of velocity over time.

    Here's how it breaks down:

    * Velocity: Velocity is the rate of change of *position* over *time*. Its unit is typically meters per second (m/s), representing the distance traveled per unit of time.

    * Acceleration: Acceleration is the rate of change of *velocity* over *time*. This means we are looking at how much the velocity changes in a given amount of time.

    Therefore, the unit of acceleration is (m/s) / s, which simplifies to m/s².

    In essence, the first "s" in the unit of acceleration represents the time component of velocity, while the second "s" represents the time over which the velocity changes.

    Let me know if you have any more questions!

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