Which is an example of uniform motion, as used in Newton’s First Law?

An air hockey puck bounces off a wall. An air hockey puck bounces off a wall.
An air hockey puck slows when the air cushion is turned off. An air hockey puck slows when the air cushion is turned off.
An air hockey puck slides across a table at constant speed. An air hockey puck slides across a table at constant speed.
An air hockey puck accelerates when a player hits it.

An air hockey puck slides across a table at constant speed.