Inelastic Collision
A collision in which total linear momentum is conserved, but total kinetic energy is not conserved.
Governing formula
∑ p_i = ∑ p_f, KE_final < KE_initial
SI unit
kg·m/s, J
In depth
Some initial kinetic energy converts into internal thermal energy, sound, or structural deformation during impact.
Examples in the real world
An automobile crash where vehicles crumple upon impact.