72. 2022年2月27日 14:10:51 : 9DmV6b8NBQ : N2tlWmd4bXNEQzY=[1]
Equivalence principle, goodbye ! (クリ）
A mass point is accelerating in various ways on a plane (without friction). And, an inertial force corresponding to an accelerated motion is generated.
An elevators cabin is accelerating downward in various ways. And, an inertial force corresponding to an accelerated motion is generated. This includes free fall. Includes any local area of free fall.
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題名には必ず「阿修羅さんへ」と記述してください。