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Answered 2010-03-21 02:51:53

No.

The velocity of an object is how fast it is moving as well as the direction of the motion. So when considering one dimension, the velocity can be positive or negative. The speed of the object is simply the magnitude (absolute value, in the case of one dimension) of the velocity, with no direction.

Acceleration is the change in velocity and does include direction. So if an object has a positive velocity (in one dimension) and its speed increases, the acceleration is negative. However, if the speed of an object moving the negative direction increases, then the acceleration is negative, because the velocity becomes "more negative."

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This is not true. Acceleration includes direction, but speed does not. Speed in a particular direction is called velocity.


Both speed and acceleration include the direction of an objects motion?

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In the study of kinematics, 'acceleration' means any change in the speed or direction of motion.


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Yes. Acceleration is defined as a change of speed and/or direction of motion. If the speed and direction of motion are constant, then there is no acceleration.


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an automobile starting from rest will accelerate in the direction of motion


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How does the direction of acceleration affect the directions of motion?

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