1. Change in velocity: This is how much the velocity of the object changes. It can be either a change in speed (how fast the object is moving) or a change in direction, or both.

2. Time interval: This is the amount of time it takes for the velocity to change.

You can calculate acceleration using the following formula:

Acceleration (a) = Change in velocity (Δv) / Time interval (Δt)

Here's how to break down each component:

* Change in velocity (Δv):

* Calculate it by subtracting the initial velocity (v₁) from the final velocity (v₂): Δv = v₂ - v₁

* Time interval (Δt):

* This is the time it takes for the velocity to change from v₁ to v₂.

Example:

Let's say a car starts from rest (v₁ = 0 m/s) and reaches a speed of 20 m/s in 5 seconds (Δt = 5 s).

1. Change in velocity (Δv): Δv = 20 m/s - 0 m/s = 20 m/s

2. Acceleration (a): a = 20 m/s / 5 s = 4 m/s²

Therefore, the acceleration of the car is 4 meters per second squared.

Important notes:

* Acceleration is a vector quantity, meaning it has both magnitude (how much) and direction.

* If an object is moving at a constant velocity, its acceleration is zero.

* Negative acceleration indicates that the object is slowing down (decelerating).