[] 相対性理論はインチキだろう.
129. 2022年9月22日 16:32:17 : awb6dcS6YA : blE4NWZyL0FQRHM=[1]
Equivalence principle　(クリ)

A free-falling elevator is assumed to be a small mass point. And gravity f and inertial force f acting on this mass point. As Newton's third law of motion states, vectors are opposite in direction and magnitudes are equal. Similarly, acceleration g and a are opposite in directions and magnitude are equal. Therefore, gravitational mass and inertial mass are the same. Then, all situations can be described simply by "mass". And above all will be in the range that Newton described.

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