158. 2022年12月01日 15:16:48 : jnYsUwORp2 : U2lqbEhUYVZFZzI=[1]
Equivalence Principle (クリ)
When a mass point is accelerated, inertial force appears. Its vector can be at our will. On the other hand, gravity acting on a mass point is unrelated to the accelerated motion of this mass point. And, the vector is not at our will. In the first place, inertial force and gravity are two different things, like water and oil (even if the vector of the two acting on a mass point happen to cancel each other out).
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