Acceleration (a) = (Final velocity (vf) - Initial velocity (vi)) / Time (t)

Here's what each variable represents:

* a: Acceleration, measured in meters per second squared (m/s²)

* vf: Final velocity, measured in meters per second (m/s)

* vi: Initial velocity, measured in meters per second (m/s)

* t: Time, measured in seconds (s)

Key points:

* Acceleration is a vector quantity: This means it has both magnitude (how much) and direction.

* Positive acceleration means the object is speeding up.

* Negative acceleration means the object is slowing down (also known as deceleration).

* Constant acceleration means the velocity changes at a steady rate.

Example:

Let's say a car starts from rest (vi = 0 m/s) and reaches a final velocity of 20 m/s in 5 seconds. We can calculate the acceleration:

* a = (20 m/s - 0 m/s) / 5 s

* a = 4 m/s²

This means the car is accelerating at a rate of 4 meters per second squared.