By "at what point does the object stop" do you mean point in time or distance?

You should be careful when describing physics problems because if you don't use the correct terminology you could come out with the wrong answer..
Do you have any units too? There would be no meaning to any of the values you've given if you do not have a units system in place.. Neither would any answer make sense.

If you could help describe your problem a little more I would be happy to help (I'm doing a physics degree so it's always good practice. :))