Which statement describes the sled's motion?
The sled has a constant velocity. The sled is accelerating.
A sled is slowing down at the bottom of a snowy hill.
An object's velocity describes its speed and its direction.
An object has a constant velocity when neither its speed nor its direction is changing. So, an object has a constant velocity when the object is:
moving in a straight line at a constant speed, or
remaining motionless.
If an object does not have a constant velocity, the object is accelerating. An object is accelerating when either its speed or its direction is changing. So, an object is accelerating when the object is:
speeding up,
slowing down, or
changing direction.
The sled is slowing down. So, the sled is accelerating.