Acceleration is a change in velocity over time. Therefore, to change an acceleration, you need to change either the velocity or the time it takes to change that velocity.

Here's a breakdown:

Changing the velocity:

* Increase the velocity: This will increase the acceleration.

* Decrease the velocity: This will decrease the acceleration.

* Change the direction of velocity: This will also change the acceleration, even if the speed stays the same.

Changing the time:

* Increase the time: This will decrease the acceleration (it takes longer to change the velocity).

* Decrease the time: This will increase the acceleration (it takes less time to change the velocity).

In practical terms, here are some ways to change acceleration:

* Applying a force: A force can change the velocity of an object, thus changing its acceleration. Think about pushing a car to start it moving – you're applying a force.

* Changing the mass: The acceleration of an object is inversely proportional to its mass. This means that a heavier object will experience less acceleration for the same force applied.

* Changing the resistance: Friction, air resistance, or other forces opposing the motion can affect the acceleration.

* Changing the direction of motion: This requires a force to change the direction of the velocity, and hence the acceleration.

Key points to remember:

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

* Acceleration can be positive (speeding up), negative (slowing down), or zero (constant velocity).

I hope this explanation helps!