If acceleration varies with time, it can of course AT ONE PARTICULAR INSTANT be equal to zero. However, it can't both change over time and remain at zero all the time.
I am not sure what you mean by reversing a zero acceleration. An object's acceleration can, of course, change over time.
If the average acceleration is zero, it means that the object's velocity is not changing over time. Since instantaneous acceleration is the acceleration at a specific moment in time, it can still have a non-zero value depending on the instantaneous velocity of the object at that moment.
As long as acceleration is zero, the object's velocity is constant.
The net acceleration in a non-uniform motion is the overall change in velocity over time, taking into account both the magnitude and direction of acceleration. It is typically calculated as the rate of change of velocity with respect to time, and can vary throughout the motion depending on external forces acting on the object.
No, an object is considered stationary when it has zero velocity and zero acceleration. Angular acceleration refers to the rate at which an object's angular velocity changes over time. If something has a non-zero angular acceleration, it means that it is rotating at a changing rate.
Zero acceleration means no change in velocity and no force on the zero accelerating body.
No, a stationary object cannot have a non zero angular acceleration. Angular acceleration is a measure of how an object's angular velocity changes over time, so if an object is not rotating, its angular acceleration is zero.
For uniform motion, the acceleration is zero. For non-uniform motion, the acceleration is something different than zero - at least, most of the time.
The velocity stays the same, it is constant
No, a dish resting on a table does not have constant acceleration. In fact, it has zero acceleration because it is not moving. Constant acceleration only occurs when an object's velocity changes at a constant rate over time.
Deceleration. Negative acceleration = Velocity is decreasing by time. Positive acceleration = Velocity is increasing by time. Zero acceleration = Velocity is the same by time.
If an object's acceleration is zero at a specific instant in time, its velocity can either be zero or a constant non-zero value at that instant. This means that the object could be either at rest or moving with a constant velocity at that particular moment.