What is the difference between uniform and constant velocity? Is acceleration zero in case of both constant and uniform velocity?

Uniform velocity and constant velocity are often used interchangeably, but strictly speaking, there is a subtle difference between the two terms.

Uniform velocity refers to the motion of an object where its speed remains constant over time. In other words, an object moving with uniform velocity covers equal distances in equal intervals of time. However, the direction of the object's motion may change. For example, a car moving at a constant speed in a circular path has uniform velocity because its speed remains the same, but its direction changes continuously.

On the other hand, constant velocity implies both a constant speed and a constant direction. An object moving with constant velocity maintains the same speed and moves in a straight line without any change in direction. A car traveling in a straight line at a steady speed is an example of constant velocity.

In both cases of uniform and constant velocity, the acceleration is zero. Acceleration is the rate of change of velocity, and if velocity remains constant (either uniformly or constantly), there is no change in velocity, and therefore, the acceleration is zero.