Specific impact energy
= Specific impact energy
{title2=$Q$}
The specific impact energy is an impactor's kinetic energy divided by the target mass. For equal-density spherical bodies,
$$
Q=\frac12\left(\frac{D_{\rm im}}D\right)^3v_{\rm rel}^2.
$$
= Specific impact energy
{title2=$Q$}
The specific impact energy is an impactor's kinetic energy divided by the target mass. For equal-density spherical bodies,
$$
Q=\frac12\left(\frac{D_{\rm im}}D\right)^3v_{\rm rel}^2.
$$