Acceleration is the rate of change of velocity over time. Here's how you calculate it:

Formula:

* a = (v_f - v_i) / t

Where:

* a = acceleration (usually measured in meters per second squared (m/s²))

* v_f = final velocity (usually measured in meters per second (m/s))

* v_i = initial velocity (usually measured in meters per second (m/s))

* t = time (usually measured in seconds (s))

Example:

Let's say a car starts from rest (v_i = 0 m/s) and accelerates to a final velocity of 20 m/s in 5 seconds.

To calculate the acceleration:

1. Identify the values:

* v_f = 20 m/s

* v_i = 0 m/s

* t = 5 s

2. Plug the values into the formula:

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

3. Calculate:

* a = 4 m/s²

Therefore, the acceleration of the car is 4 m/s².

Important Considerations:

* Direction: Acceleration is a vector quantity, meaning it has both magnitude and direction. If an object is slowing down, its acceleration is in the opposite direction of its motion.

* Constant Acceleration: The formula above assumes constant acceleration. If acceleration is changing over time, you'll need more advanced calculations.

* Units: Make sure all units are consistent (e.g., meters, seconds) before plugging them into the formula.

Let me know if you have any other questions!