It is called constant velocity. Rate is just another word for velocity. This, however, is dependant upon the path the object is taking. If it is moving in a parabolic path, or a curve of some sort (anything but a straight line), then the object is actually accelerating (as acceleration is a change in velocity OR direction.)
'Constant velocity' means constant speed in a straight line.
That's also a good definition of zeroacceleration.
The velocity increases at a constant rate.
It velocity is constantly increasing, v=vo + at.
An object in uniform circular motion undergoes constant acceleration but moves at constant "speed".Constant "velocity" means no acceleration.
An object that moves with constant position will have constant velocity or acceleration. This is said to be moving in positive direction and maintains the position.
The acceleration of an object with constant velocity is zero. It's force will be Mv^2 where M is it's mass and v is it's velocity.
Both are definitely zero
It moves with a constant acceleration downwards. This means that its velocity is increasing at a constant rate.
When an object moves in a circular path, the velocity will change and the there will be acceleration.
An object moves with constant velocity when there is no net force acting upon it. If there are no forces acting on an object, or if the forces acting on it "cancel out" leaving a net force of zero acting on the object, it will have zero acceleration. With a zero acceleration, the velocity of the object will be constant.
An object moving with uniform acceleration has a uniform change in velocity over time, and its velocity-time graph will be a straight line with either a positive or negative slope. An object moving with no acceleration has constant velocity, and its velocity-time graph will be a straight, horizontal line with zero slope. Refer to the related link for illustrations.
There is only acceleration if the car's velocity changes. If it moves at a constant velocity, then there is no acceleration.
In Simple motion, there is no force being applied. The moving object moves in a straight line with constant velocity. In acceleration, there is a force applied. The object's velocity is changing. The first derivative of acceleration is velocity. The first derivative of velocity is distance. (Derivative is a calculus thing.)