Constant acceleration is a type of motion where the velocity of an object changes by the same amount every second. This means that the object is accelerating at a constant rate and is not changing direction.
Variable acceleration is when the velocity of an object changes by different amounts over time. This means that the object is not accelerating at a constant rate and may be changing direction. Constant acceleration, on the other hand, means that the velocity changes by the same amount every second and the object is moving in a straight line.
The formula for calculating constant acceleration is a = (vf - vi) / t, where a is the acceleration, vf is the final velocity, vi is the initial velocity, and t is the time interval.
On a velocity-time graph, constant acceleration is represented by a straight line with a positive slope. The slope of the line represents the acceleration, and the steeper the slope, the greater the acceleration.
Some real-life examples of constant acceleration include a car moving at a constant speed along a straight highway, a ball falling due to gravity, and a rocket launching into space. In all of these examples, the velocity is changing by the same amount every second, indicating constant acceleration.