Maximum Extension of a Massless Rod After Impact with a Falling Ball

[Sumanth]

A ball of mass 'm' drops from a height 'h'. Which sticks to a massless hanger after striking it .. Neglect overturning. Find out maximum extension in rod, assuming that the rod is massless..

 

[Simon Bridge]

Good question.
Is there some reason you didn't want to use the template?
Anyway, please show us your best try at the problem.