trips with A5o

I am calling because I want to see his hand and can afford to lose $2. That's about as rational a reason you can expect. There are equally rational reasons to fold. You shouldn't waste time or thought on this. It is impossible to read the hand or the mind of a bad player.

I would slamdunk call here. So little combo's have you beat, and on 2NL so many people will (semi-)bluff-shove here with flushdraws, Qx, 5x, all kinds of pairs incl AA, KK.
I would not exclude 99 nor QQ thou. This is 2NL, people limp with good hands, but chances on that are slim.

Without the ace kicker, I would prob fold

The pot is so low that a raise otf is obligatory

I will follow the rule to never play for stacks in limped pot without the nuts.
Here there are possible better hands and I am not calling.

I agree with nitrol on this one. If we had some notes on villain, that he is capable of doing this with complete air (or with weak hands) we can call. Against unknown I vote for fold.

This is a spot that will not happen often. You can't make a correct decision without a crystal ball. You can call if you want to see his hand, or you can fold if you want to play it safe.