If you can live without ever being able to get the data off of it, you lose nothing by opening it up and seeing what the issue is. Just keep in mind that opening it usually foregoes sending it out for recovery.
With that being said, my grandson knocked my 3tb off my desk a few months back while I was writing to it. Dead drive afterwards. So I explained how they work and proceeded to open it. As predicted, the head had welded itself to the platter in that brief moment of contact.
Unstuck the head and the drive could surprisingly read and write again. Usually the head is damaged beyond usability. Not that I would ever trust it and did not need anything from it since my data is backed up several times. But its a good lesson to learn while young IMO. I still have it on my desk, one day I'll scavenge the magnets and sell the control board. LoL
If your drive was 'off' when you dropped it, you might just find that the head(s) are stuck in the parked zone; otherwise expect similar results as mine.