im been wondering how smart do you have to be to be a cop because i dont really get good grades at skool and im probably not the brightest kid...im 17 and i a senior in hs and i dont knoe if im goodenough to be in the police force..im also not really a people person

You don't have to be a rocket scientist. Do the best that you can. Improve your basic grammar, spelling, and math skills as much as you can. You have to gain some confidence. To be a police officer, it is better to be a "people person". Try to improve yourself if needed. Keep a positive attitude. Try doing some ride-alongs, or joining a police explorer program to try to find out if being a police officer is right for you.