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What would a nearly friction-free environment save on a large scale?
AEnergy now wasted as heat
BMass now lost as dust
CTime now lost to repairs
DWater now lost by cooling
Answer & Solution
Correct answer: A. Energy now wasted as heat
1. Friction turns useful energy into heat wherever surfaces rub.
2. That conversion is described as unnecessary, since it does no useful work.
3. Nearly friction free environments would stop that waste.
4. The saving is put at hundreds of billions of dollars of energy.
_Source: OpenStax College Physics (CC BY 4.0), Ch 5 "Further Applications of Newton's Laws: Friction, Drag, and Elasticity", section Making Connections: Submicroscopic Explanations of Friction_
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