I've recently answered the question Find the vector position of a moving object. The question surely isn't well-stated and seems like a straight-forward homework question. Two problems:
1) What I don't understand is the strict "no homework questions" on this site. Firstly, Stack Exchange aims to be an archive of knowledge where questions are not only answered to benefit the person asking the question but to build up a database of knowledge. Of course questions have to be well-asked with a description where you are stuck and what you've already tried. Questions that aren't within the scope of the site (off-topic does not mean that the question isn't well-asked or a homework question, it simply means that the question isn't about physics) should be tried to be improved and not simply ignored / downvoted / whatsoever. Maybe the mods here should look at the homework policy over at Maths StackExchange, where it isn't as strict and leads to more question that can be helpful to people.
2) Why do you have to delete answers to homework questions? That's just childish behaviour and doesn't benefit anybody. What would be the reason to do so? The author of the question didn't ask a good question, sure. But deleting answers shows that you haven't understood what this site is all about. Not only the thread author is meant to benefit from such an answer, but anybody having the same problem. Improve questions like that (the edit/comment button is there for a reason and don't delete work of other people. My answer was deleted by the user "rob" who didn't do anything to improve the answer. No comment, no edit, nothing. If you are not willing to contribute meaningfully, then why delete answers? That's just childish.
The homework policy (1) on specific subsites of StackExchange is debatable and of course depends on individual opinion. Just deleting answers randomly (2) is not and doesn't improve anything.