I have a simple (?) calculation like question that I can't solve myself due to not enough knowledge. Nearly like homework question, but hopefully not. Can I ask this kind of questions here?
For the sake of a short story that I am writing currently, I need to calculate an approximate (not exact) depth to which a bullet will drill when a marksman fires it and misses totally. Bullet hits a soft soil in a city lawn.
Marks man uses 9x19 Parabellum which has approx. 396 m/s when leaving a barrel. He shots from a third floor in a direct, straight line way down toward lawn. Assuming 12 metres height plus 12 metres distance and using Pythagorean theorem, I can calculate bullet distance before it reaches ground to approx. 17 metres. And using a simple velocity formula I can assume that bullet needs approx. 0.04 second to reach the ground.
But I completely fail when it comes to calculating air and soil resistance. Assuming that this is a correct approach into calculating distance / drill-in depth of a bullet in a soil until it comes to a complete stop.
Is this a kind of question that can be asked here? Or would it be treated off-topic?