can you please help me with this physics problem? i dont understand it. Thank you!

can you please help me with this physics problem?

I’m working on a loop-the-loop physics question involving rolling motion and would like help understanding the steps. A billiard ball with radius r and mass m rolls without slipping down a track and into a vertical loop of radius R. It has just enough speed to barely make it over the top of the loop. a) In class/problems before, we found that for an object that slides without friction into the loop (no rotation), the minimum starting height needed to just clear the top is H=52R.H = \frac{5}{2}R.H=25​R. Now the object is a rolling billiard ball instead. If this ball rolls without slipping and just manages to clear the top, does it need to start from a different height than the sliding object? If so, should that height be larger or smaller? Please explain conceptually, using energy ideas, without doing detailed calculations yet. b) When the ball is just barely making it over the top of the loop, what are:(i) the normal force acting on the ball at the top of the loop, and(ii) the ball’s...

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