Acceleration has a direction!
 | If the object is
speeding up,
the direction of the acceleration is the direction of the
initial velocity.
Representation:
|
| If the object is
slowing down,
the direction of the acceleration is opposite to the direction
of the initial velocity.
Representation:
 |
| If the object is
turning, the
direction of the acceleration is perpendicular to the direction
of the initial velocity towards the center of the turn.
Representation:  |
|
