She merely slid around upon the frictionless inner surface of the zone.
The person also does not realize that it is very easy to move a box on a frictionless surface!
Many of these objects are far harder to imagine than inclined plane with a frictionless surface.
The Liar was as they had left it: on its back on a frictionless surface.
"Beautiful," Mildred said, running fingertips across the smooth almost frictionless surface.
He pantomimed sliding along a frictionless surface, hands waving, so that she giggled.
The same is true of perfectly elastic billiard balls on a frictionless surface.
Since we do not experience truly frictionless surfaces in everyday events, their properties seem a bit weird, to say the least.
This is as close as we can get to a purely frictionless surface and the reasoning holds.