Also the last one: "Negative mass is attracted to positive mass". How? With gravity 2 positive masses attract to each other. I don't know what happens if 1 mass is negative , but to me it's not obvious that they still attract.
And I don't see how this relates to the previous examples. In my mind, impact and friction has nothing to do with gravity.
And I don't see how this relates to the previous examples. In my mind, impact and friction has nothing to do with gravity.