Wordpress Help link structure

[Roeg1]

Hi guys not sure if this is possible im trying to create webpages on my site as example.

www.mywebsite.co.uk/cars
www.mywebsite.co.uk/bikes
www.mywebsite.co.uk/computers

etc etc But for some reason I can only create.

www.mywebsite.co.uk/index.php/cars
www.mywebsite.co.uk/index.php/bikes
www.mywebsite.co.uk/index.php/computers

Now Id like to remove index.php from the url is this possible to have a straight url to a page like I want ?