Truly though the question as stated is really more in the nature of finding out something about the person(s) willing to attempt an answer.

Look back through this thread. Some of the responses show how a person tackles problems. Others posts illustrate the writers grasp of mechanics and kinematics. Some writers take a stand then endlessly validate it with practical trivia, avoiding the the fact that the provided info is ambiguous. Assumptions run rampant. Some just like a good arugment or generate one by themselves not clearly writing what they mean. (Sort of like the original question.) As an assesment tool it it can tell you a lot about people. Even if they recognize it as such, it still says something about them.

Fun abounds.