acceleration
negative
velocity
positive
9...
10.
-direction
time
Acceleration occurs when an object's 5. changes.
When an object speeds up, it has 6.
acceleration.
When an object's final velocity is less than its initial velocity, however, it has
7.
acceleration. An object that is changing
8..
.. is accelerating, even if its speed remains the same.
Acceleration can be calculated by dividing the change in velocity by the
interval in which the change occurred. The SI unit of
is m/s².