Question

lf a hockey puck slides on a perfectly frictionless surface, will it ever slow down because of its inertia

Answer 1

the law of inertia says, a body that is in motion stays in motion unless a force acts upon it. if its at rest it stays at rest.
here there is no force acting upon the puck.
can you answer now?

Answer 2

In reply to perl, that is the surface in which the puck was sliding, the poser never considered the friction from air. Does this mean that eventually the puck will stop because there IS a force acting upon it? Even though the surface is friction-less?

Answer 3

@Helpme1999
good point on air resistance