[ichabod1]

The thing about a spear, or an arrow, or any kind of missile like that is that the tip is so very small but it’s the full weight of the column of mass applied to that one small spot, like a hammer driving a nail. So it’s momentum that determines whether your spear drives through or bounces off.

[ssschev]

The thing about a spear, or an arrow, or any kind of missile like that is that the tip is so very small but it’s the full weight of the column of mass applied to that one small spot, like a hammer driving a nail. So it’s momentum that determines whether your spear drives through or bounces off.
~~~~~~~~~~~~~~
F=M*A
Physics 101.

If we choose get more technical then we need to add Coriolis effect, materials (ballistics and target), friction, distance and lest we forget GRAVITY.

Humor:

Girls;
“The only things that defy gravity are women...The heavier they are, the easier they are to pick up.”

Mine:

Guys;
Anti-gravity
The heavier they are, the harder it is to get attraction.

Physics 101.