It's actually pretty interesting that the impact speed is not that crucial when it comes to how deep the projectile is embedded. Isaac Newton was the first to e

It's actually pretty interesting that the impact speed is not that crucial when it comes to how deep the projectile is embedded. Isaac Newton was the first to explain it and to approximate how deep a projectile can go -- it boils down to the density ratio of the impactor and the target material. Additionally, penetrating the atmosphere itself can be thought of as equivalent to penetrating 10 meters of water, so the projectile already loses a lot of energy to push through it. See https://en.wikipedia.org/wiki/Impact_depth https://en.wikipedia.org/wiki/Impact_depth for more explanation.