there's four speed. There are constant speed, average speed, increasing speed, and decreasing speed.
choose one of them
When you (or an object) travel without changing speed, then you have constant velocity (speed). This means there is no change in speed (acceleration) when you (or an object) is traveling.
It is travelling at a constant speed. This does not mean that there is no acceleration or that the direction of motion remains the same.
That's the object's 'speed'.
It is travelling at a constant speed. This does not mean that there is no acceleration or that the direction of motion remains the same.
Acceleration is the rate of change of VELOCITY, not of SPEED. If the velocity changes, there is acceleration. It is enough for the direction to change.
constan velocity (is measured in meters per second)
If speed does not change then the object is moving with constant speed. when object moves in a circle its speed does not remains constant. Speed of object remains constant only if it moves along linear path.
If a velocity or speed is constant there isn't an acceleration. This is because the acceleration is the change in speed or velocity and if it's constant then there sn't a change.
a car traveling the speed limit
No, speed is directionless.
Acceleration is not a change in speed, but a change in velocity. Velocity is, unlike speed, a vector, and so as the direction of velocity changes there must be an acceleration to cause that change.
subsonic