If an object's speed is changing ... either growing or shrinking ... or the direction of its motion is changing, or any combination of these changes, then the object is said to be accelerated.
No. Acceleration is simply the change in velocity, or the change in speed, whichever way want to think about it. If the object is slowing down, it has a negative acceleration. If it is speeding up, it has a positive acceleration. If it is at a constant speed/velocity, it has zero acceleration.
Yes. Acceleration is defined as a change in velocity. Since velocity is a measurement of speed and direction, acceleration is the change of speed and/or direction of an object's motion.
Another Answer
Acceleration is the difference in velocity (which is the difference in displacement / difference in time) divided by the difference in time. Acceleration is not directly related to the change of speed or the change in direction. They will however affect the overall time.
Acceleration is change of velocity / time.
An object is accelerating if its speed or direction changes with time. Since speed and direction are the components of velocity, an object is accelerating if its velocity changes with time.
false
Yes. Acceleration is the rate of change in speed (either linear or rotational).
Only the acceleration brings a change in velocity.
mass
False
In that case, the speed changes over time.
The answer for the blank is "constant".
The speed may, or may not, change. Acceleration means that the velocity changes; this means that either the speed changes, or the direction.
An object is accelerating when its speed or direction changes
An accelerating object is one that is changing in either speed or direction. Thus any object that is turning is accelerating while maintaining a constant speed.
In that case, the speed changes over time.
The answer for the blank is "constant".
An object that is accelerating may slow down, speed up, or change direction.
Acceleration is the time rate of change of velocity. Velocity is a vector. It has a magnitude ( speed ) and a directio. If either the speed or the direction of motion changes the object is accelerating. Example; an object moving in a circle at constant speed is accelerating because its direction is continually changing.
The speed may, or may not, change. Acceleration means that the velocity changes; this means that either the speed changes, or the direction.
An object is accelerating when its speed or direction changes
An accelerating object is one that is changing in either speed or direction. Thus any object that is turning is accelerating while maintaining a constant speed.
That is possible, for example, if an object moves around in a circle. In this case, the velocity changes all the time; the speed does not.
An object is not accelerating when it is moving in a straight line at an unchanging speed (which may be zero).
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.
An object that is accelerating may be slowing down, gaining speed, and changing direction.
It will have increase in speed with increase in time