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On an air hockey table with the air turned on, the puck glides far without slowing because the surface is:
ASlightly inclined
BNearly frictionless
CPerfectly rigid
DStrongly magnetic
Answer & Solution
Correct answer: B. Nearly frictionless
1. The puck's behaviour changes as soon as the air is switched on.
2. When the air is turned on, it creates a nearly frictionless surface.
3. The puck then glides long distances without slowing down.
4. That is Newton's first law made visible by removing the usual cause of slowing.
_Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_
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