Having done my time as an Army medic, this is incorrect. It takes more force than that, but less than you might think. A good 25 kilos with some velocity behind it will easily sever a phalange. Up it to 50 or 80 kilos and you can claim an arm or shin. Mass is the real killer. I’ve seen a vehicle at comically slow speed absolutely yeet someone because it had several tons of momentum behind it.