If a body moves with uniform velocity. Why it's acceleration is0?
We know of the term accelerator right? We have it in our vehicles (Ex: Bikes, Cars etc). So basically what does it do? It increases/decreases the speed of the vehicle in a direction(May be a straight or zigzag road). It means the speed changes along with direction.
Uniform velocity means there is no change in the speed of the body (See the word uniform) along with the direction.
As there is no change in the velocity, there is no acceleration as well. So answer is simply Zero. :)
Acceleration is the rate of change in velocity expressed mathematically as dv/dt = a.
An object moving at uniform or constant velocity has zero acceleration because there is no change in velocity