[] 相対性理論はインチキだろう.
235. 2023年9月08日 13:22:42 : 7G8yb3q2kg : a2JnNGdGWGd0Q1U=[1]
Decelerated Motion 　（クリ)

From a passenger car moving to the right, a rope is extending to left, and on it, constant tension is acting. Then, the passenger car is decelerating. And, when the ground speed of passenger car falls in zero, tension of the rope is still constant. So passenger car starts accelerating to the left. But, there will be no difference in situation in before and after in the passenger car. There will not be much meaning in the ground speed of passenger car.

As written above, everything is accelerated motion and decelerated motion does not exist. But "counter-jerk motion" where degree of accelerated motion withdraws may be possible.

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