That would be "Deceleration" or negative acceleration.
Positive acceleration = speeding up. Negative acceleration = slowing down.
The acceleration is opposite the direction the object is moving, so the acceleration is negative and southward.
This would indicate negative acceleration, which would mean that the object in question is speeding up.
because acceleration is speed over time
slowing down
decelerate
Technically, it is acceleration either way. If something is slowing down, the acceleration is negative. Slow down or Decrease velocity
Positive acceleration = speeding up. Negative acceleration = slowing down.
The acceleration is opposite the direction the object is moving, so the acceleration is negative and southward.
This would indicate negative acceleration, which would mean that the object in question is speeding up.
because acceleration is speed over time
Deceleration
slowing down
Acceleration is the change of velocity, with direction. Therefore slowing down is a change in veolcity, so is considered to be acceleration (just negative acceleration).
In general, slowing down is negative acceleration. Some might call it deceleration. Braking a car or bike is a simple example of negative acceleration.
Positive acceleration = speeding up. Negative acceleration = slowing down.
Deceleration. Slowing down can also be expressed by quoting a minus number for the amount of acceleration, e.g. -5m/s.