Nail to create more stronger attachment

Mar 2019
875
47
cosmos
Dragon:
Oh, maybe I use Chinese English again…
What I mean is below:
The values of elements about movement such as force, acceleration, x, y, z, or time t can trend to ∞ theoretically. But the value of speed can only trend to 300000 km/s. Actually, it’s a very small value in the planetary scale. Why physics (cosmos) mistreat speed? It seems not reasonable logically.
 
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Mar 2019
875
47
cosmos
多一个长度维度少一个长度维度一百个数学维度。。。那种东西有个鸟用?the key is to solve physical hard nut.