constant acceleration is a measure of a continuing increase in velocity per unit of time.
another way to express it is:
d²x/dt² = c where c is a constant
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If your velocity is constant, then your acceleration is zero.
There is a huge difference between constant speed and constant acceleration. Constant speed is when the object is travelling constant, no change in its velocity and acceleration or in other words no extra force to speed up. Constant acceleration when the object is acceleration constant, it means that the speed of the object is change at the same rate each second. The acceleration rate at which the object is travelling is constant. for example, when a car is stationary at a traffic light and it starts acceleration, picking up speed but the rate of acceleration will not constant because the amount of force applied differs each second due to the acceleration rate.
constant speed=0 acceleration Acceleration is the change in speed. If the speed doesn't change(ie constant) the acceleration is zero.
constant acceleration is when you gain the same speed over the same time
Changing at a constant rate equal to acceleration.