Bullet Into Wood: Heat or Energy Loss?

[yolo123]

Hello,

This is not really homework, but is in the context of my course.

We always say that a bullet embeded into a wood does not conserve energy. We say heat is created. But, I was wondering: is the deformation of the wood considered heat released or is it some other kind of energy?

Is there any other kind of energy loss? What type?

 

[paisiello2]

The deformation of the wood would be a combination of elastic and inelastic energy. The elastic component would be conserved but the inelastic portion would not.

Other energy losses aside from heat/friction would be sound and possibly light from sparks.