For two bodies having direct impact, coefficient of restitution is given by
1
\(\frac{{Velocity\;of\;approach}}{{Velocity\;of\;separation}}\)
2
\(\frac{{Velocity\;of\;separation}}{{Velocity\;of\;approach}}\)
3
\(\frac{{Initial\;velocity\;of\;the\;body}}{{Final\;velocity\;of\;the\;body}}\)
4
None of the above