This is a question from Class 11 Physics NCERT.
The answer is that only graph (v) is correct and the reason given here is that potential energy varies inversely with separation. But does that always have to be the case?
Also, I had learnt that during elastic collision, all the kinetic energy momentarily converts to elastic potential energy due to deformation, which means that potential energy should be maximum. But here the graph shows that the potential energy is minimum during collision.
I'm certain I am missing a key concept here. Can anyone help me understand where I'm going wrong? Thank you.