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  • I have no idea how a 50G car crash compares to a 50G rugby tackle in terms of risk of injury.

    To give an idea, if an 85kg rugby player was running along at a fast 15 km/h and was subjected to 50g of decelerative force, it would take 0.0085 seconds for them to come to a complete stop, faster than their body could register*, and it would be like lying under a mass ≈4200kg.

    *I fact checked, apparently our eye-brain connection can process information in intervals as fast as 0.013ms, so possibly faster than the player could perceive.

  • Sure, but in that example can I assume that 25G would be coming to a stop in 0.017 seconds?

    I think most of us here would struggle to notice the difference between those 2 time periods even though 1 is twice the other.

    And are human reaction times and perception times the same? I don't have any facts to prove it, but I struggle to believe that.

  • And are human reaction times and perception times the same? I don't have any facts to prove it, but I struggle to believe that.

    Sorry, thought I was editing a post before submitting, so what I wrote might’ve changed between your response and now.

    Adding - it’s unlikely than reaction time = perception, particularly as reactions require signals to go to and from the nervous system.

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