>>13830270with portals:
the orange portal accelerates (it hits the platform and stops. stopping is an acceleration)
the space around the orange portal accelerates relative to the orange portal
the blue portal DOES NOT accelerate
the space around the blue portal does not accelerate relative to the blue portal
the cubes do not accelerate (stop) relative to the blue portal
with hula hoops:
the orange side of the hula hoop accelerates (it hits the platform and stops. stopping is an acceleration)
the space around the orange side of the hoop accelerates relative to the orange portal
the blue side of the hoop DOES accelerate (it hits the platform and stops. stopping is an acceleration)
the space around the blue side of the hula hoop does accelerate relative to the blue side of the hula hoop
the cubes do accelerate (stop) relative to the blue side of the hula hoop
