Wait.... I've got to be honest that there seems to be a chunk of information missing here. One would assume that going to uni has been discussed previously. So.... why the violent outburst? What lead him to saying 'you're not worth it...."
I think it is important to look at all sides of this story. What part did you play in this argument? It is hard to believe that he all of a sudden started calling you names and ripping up your finance paper.
Now, that being said, you definitely didn't deserve that kind of treatment regardless of what lead up to his out burst. Is there someone who can mediate for you to so that you can discuss this without emotions getting involved??? Clearly it is best to achieve a university degree if at all possible. He knows that if he has a university degree.
If you have done anything to cause this outburst for example: not revising for A Levels, slacking off in your school work, drinking and being abusive yourself, etc then it may be time to suck it up and go talk to him and change your ways to prove to him you are committed to going to uni for the right reasons and not just going to party or whatever (you know what I mean). BUT, if you are a good student, you try hard, you're respectful (which you should be if it is his money even paying for some of the expenses) and making good grades and have decent predicted scores on your A Levels and he's STILL like that then you need to go find outside help.
You spoke of suicide and you need to come up with a better plan!!!! That is NOT or ever will be the right answer! There are abusive people in this world and sadly for father may be one of those people. Do you have a counselor at school, or anyone else that you can have an honest discussion with about your father and hopefully advocate for you? Or find a mental health therapist who can listen to you and suggest helpful ways of dealing with your father.
Sorry this is long but I suggest you:
* Take an objective look at yourself and see if you have contributed to why your father had that outburst. Make things right with him if you can.
* See if you can find someone who can be a mediator between you and your father so you can talk w/out emotions flaring
* Get help from a school counselor
* Suicide is NOT the answer and there are definitely mental heath therapist you can help you and give you much needed advice.
Do whatever you need to get to uni. Good Luck to you.