* Acceleration: Refers to an increase in velocity over time. This means the object is moving faster in the same direction.
* Deceleration: Refers to a decrease in velocity over time. This means the object is moving slower in the same direction or changing direction. It's often called negative acceleration.
Key Points:
* Both acceleration and deceleration are changes in velocity.
* The difference is the direction of the change.
* Deceleration can also mean slowing down while changing direction. For example, a car turning a corner while slowing down.
Example:
* Acceleration: A car speeding up from 0 to 60 mph.
* Deceleration: A car slowing down from 60 mph to 30 mph.
* Deceleration (changing direction): A car braking to a stop and then reversing.
In summary: Acceleration is any change in velocity, whether it's increasing or decreasing. Deceleration is a specific case of acceleration where the velocity is decreasing.
