just in case someone might get confused about this.
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I suppose that a ball traveling the fastest will cause the most damage to a person "due to the extra weight" flowing from the acceleration.
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I believe that you are refering to momentum.

when an object is in motion it has momentum.
this would be the additional force that the person would feel.
the ball would weigh the same no matter how fast it is traveling.


and you are right nothing that we weigh here on earth would weigh the same if the earth was not rotating on its axis.
and doing all the other moves it makes.

of course we would either freeze or boil if it ever stopped.

3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.