What is non uniform velocity

"Non-uniform velocity" occurs when an object changes its velocity upon motion. This happens when the object either accelerates or decelerates (negative acceleration) in its speed or changes its direction.

Explanation:

"Velocity" refers to speed with a specific direction.

If the velocity is uniform, there's no change in speed and direction. However, if changes occur on either the speed, direction or both, then the velocity becomes variable or non-uniform.

For example, when it comes to a moving car, it is said to be in non-uniform velocity if the distances covered is unequal in relation to the equal intervals of time.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

because if the tool that you are using is not balanced it there would be false mass.