crippledjosh

crippledjosh t1_j4ivgvi wrote

I'm not familiar with how recoil systems work, in total you've still only possibly got acceleration for the exact amount of the mass of the bullet * bullet acceleration/mass of the shooter and in the opposite direction of where the bullet went

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crippledjosh t1_j4itpwx wrote

Firstly it's not the vacuum that's important it's the lack of gravity (or any other forces) acting on you. Therefore making any force that does act on you cause acceleration. Mass is in no way irrelevant, force=mass*acceleration and any force has an equal and opposite one. The force of the bullet moving out of the gun will be applied directly to the body firing the gun and accelerate that body by force/mass

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