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Ans : Having a constant velocity means that you’re going at the same speed and in the same direction continuously. Of course, if you have a constant velocity, this means that you have zero acceleration. This might sound like your car is stuck on cruise control but it could also mean that you are on a steady, flat road rather than one of those curvy mountain passes.
Constant acceleration is quite unlike the other two types of acceleration. If you get constant acceleration, your speed is constantly growing, but by a consistent amount every single second. The acceleration due to gravity on Earth has a constant value of 9.8 m/s2.
