Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 5 - No. 24)
What does it mean if the acceleration is negative on a speed-time graph?
The object is speeding up.
The object is slowing down.
The object's speed is constant.
The object is at rest.
Shpjegimi
Negative acceleration (deceleration) means the object is slowing down.