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strong nuclear force???

please can someone explain to me whether the Strong nuclear force is attractive or repulsive. I thought it was always attractive, however on an AQA A Synoptic paper, question 1.
http://store.aqa.org.uk/qual/gceasa/qp-ms/AQA-PA10-W-QP-JUN06.PDF
http://store.aqa.org.uk/qual/gceasa/qp-ms/AQA-PA10-W-MS-JUN06.PDF
it suggests that the strong nuclear force can be attractive some times, and repulsive other times.
how can this be?
Reply 1
Avatar for Jooeee
Jooeee
2
At very short distances it becomes repulsive because otherwise the atom would become squashed to a single point.

As to how this actually happens, how it changes from attractive to repulsive I don't know but I expect you won't need to know that?
Reply 2
Avatar for Cardozo
Cardozo
1
Enough force to attract the nucleons together, But then enough force to repel the nucleons at the same time if they become to tightly packed.
Reply 3
Avatar for Benamin
Benamin
OP
oh ok, i guess that makes sence. but how does that actually happen? the force can't exactly think "i've gone far enough". or am i asking too much?

thanks anyway :smile:
try checking the leanord-jones potential model - basically an equilibrium between the attractive/repulsive force is found.

It doesn't work in the exact same way with strong nuclear force, but for this level thats the idea you can keep in mind
Reply 5
Avatar for Benamin
Benamin
OP
ok thanks

i dispise this paper. Actually hate it. So freaking annoying.

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