1. The object's initial velocity: This is the velocity of the object at the beginning of the time interval you are considering.
2. The object's final velocity: This is the velocity of the object at the end of the time interval you are considering.
3. The time interval: This is the amount of time that elapses between the beginning and end of the time interval you are considering.
Once you have this information, you can use the following formula to calculate the object's acceleration:
```
acceleration = (final velocity - initial velocity) / time interval
```
The acceleration will be in meters per second squared (m/s^2).
Here is an example of how to calculate the acceleration of an object that is moving in a straight line:
* An object starts at rest and moves with a constant acceleration of 9.8 m/s^2 for 5 seconds.
* The object's initial velocity is 0 m/s.
* The object's final velocity is 49 m/s.
* The time interval is 5 seconds.
Plugging these values into the formula, we get:
```
acceleration = (49 m/s - 0 m/s) / 5 seconds
= 9.8 m/s^2
```
Therefore, the object's acceleration is 9.8 m/s^2.
