no tutorial on hinges specifically.
pretty simple stuff
heres a quick tutorial
start a new cap
make 2 sprites
put physics behavior on both
make sprite1 immovable(on the properties for the physics behavior)
put sprite1 in the center of the layout
put sprite2 to the right of it, and leave a decent space between
in your event sheet, make one event
start-of-layout
then add one action. sprite2, under physics tab
create hinge to sprite1
run the cap
you'll get the idea
if you do a hinge in both directions the hinges fuse the two objects together and no longer rotate like hinges