[] 相対性理論はインチキだろう.
171. 2023年1月22日 15:13:44 : VPDZ2ZXDDE : OXo4WUFORm5oYTI=[1]
Inertial Force is not Fictitious (Continued)

In previous lost (170), both sides of formula F = ma are divided by m. Now, alternatively, F = ma are divided by a. Then, formula F/a = m is given. This will also show that a and ma will not be fictitious.

Also, two formulas F = ma and F = mg may not be compatible with the assertion of gravitational mass and inertial mass (“Both are completely different phenomena” on Wikipedia “mass” in Japanese. Also, not be compatible with existence of two idioms).
http://www.asyura2.com/0306/idletalk2/msg/1242.html#c171