* Acceleration is the rate of change of velocity. If acceleration is constant, it means the velocity is changing at a steady rate.
* On a velocity-time graph, the slope represents acceleration. A straight line has a constant slope, indicating a constant rate of change in velocity (i.e., constant acceleration).
Here's a breakdown:
* Positive acceleration: The line will slope upwards. This means the velocity is increasing steadily.
* Negative acceleration (deceleration): The line will slope downwards. This means the velocity is decreasing steadily.
* Zero acceleration: The line will be horizontal. This means the velocity is not changing, so the object is moving at a constant speed.
Example:
Imagine a car accelerating at a constant rate of 5 m/s². On a velocity-time graph, this would look like a straight line with a slope of 5. For every second that passes, the car's velocity increases by 5 m/s.
