You didn't mention what type of tree it was. Some fast growing trees
often
have problems like the ones you mentioned because their wood is very soft.
In the future, you might consider either an Ash or an Elm tree. Some
varieties of both grow fast, yet are quite strong.

Stay away from Ash!!! Their roots are pretty much on top of the ground
and will ruin your yard.

Actually, stay away from all fast growing trees unless you need quick shade
and intend to take them down in a few years. These are the trees builders
use for landscaping because they look good to a potential buyer, but a few
years down the road, they are nothing but problems.