This is a site with simple problem examples to try out

• Net Force and Diagram problems

Here is a site on FBD with an introduction on how to do them and then a set of activities. Its mostly text besides the answers at the bottom of the page, wish it had a spoiler tag on it.

• FBD Exercise

Here is a tutorial on how to draw and interpret FDBs

• Drawing and Interpreting

This is one of KC's examples

Here is Andrew's first problem and solution

Here is Andrew's second problem and solution