Three-two programs can be tough to coordinate unless the two schools are in close proximity as these schools are. I would look very closely at the “joint” program from the prospective of both of the school’s admissions offices. You want to be sure you know the rules before you are too far into the program. What grades are they looking for in the calculus and physics classes for you to jump over to the math/physics classes at Georgia tech?
Morehouse is an excellent school! The applied math focus at GT may be more intense because of the University’s subject focus. Do you need to gain admission to the program after some time at Morehouse or are you assured admission after certain grades in certain courses?
Good luck! May the force be with you!
:bz