How do I make a switch for a door that will only open after you shoot/slash a switch, like how you get inside the ship at the beginning of JK level 10? I don't know much about cogs and can't find anything in the tutorials about it.

There's a cog for it.

I'm not sure which one it is, but if you scroll through the list reading the cogs you should be able to find it.

If you know the level you might be able to narrow your search a bit.

I've found I've gotten familiar with the lists of cogs since I first started editing. After a while you'll remember what area different cogs (such as this one) are at and it'll be easier to find.

Although, someone smarter than me can feel free to post something more helpful....

10_conduit.cog, got it.