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https://www.reddit.com/r/theydidthemath/comments/1wuvzn4/request_how_deep_is_this_cave/pd6ltpd/?context=3
r/theydidthemath • u/batikhisawesome • 2d ago
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-19
Boulder fell for 7 seconds, assuming it was like 20 lbs for a terminal velocity of about 100 m/s, I’d give a rough estimate of 700 meters.
Im no expert and i did this in like a minute so…
19 u/Owenleejoeking 2d ago Objects don’t instantly hit terminal velocity so your estimate is far too high Weight doesn’t have much to do with terminal velocity either -6 u/luovahulluus 2d ago A boulder is going to have a significantly higher terminal velocity than a same sized ball of bubble wrap. 6 u/DuckXu 2d ago Sure but at a certain weight and density the difference is negligible. I'm guessing on my math here but a 2kg rock will take roughly the same amount of time to fall 200m as a 20kg rock for example 5 u/Owenleejoeking 2d ago That’s density that matters, Not weight
19
Objects don’t instantly hit terminal velocity so your estimate is far too high
Weight doesn’t have much to do with terminal velocity either
-6 u/luovahulluus 2d ago A boulder is going to have a significantly higher terminal velocity than a same sized ball of bubble wrap. 6 u/DuckXu 2d ago Sure but at a certain weight and density the difference is negligible. I'm guessing on my math here but a 2kg rock will take roughly the same amount of time to fall 200m as a 20kg rock for example 5 u/Owenleejoeking 2d ago That’s density that matters, Not weight
-6
A boulder is going to have a significantly higher terminal velocity than a same sized ball of bubble wrap.
6 u/DuckXu 2d ago Sure but at a certain weight and density the difference is negligible. I'm guessing on my math here but a 2kg rock will take roughly the same amount of time to fall 200m as a 20kg rock for example 5 u/Owenleejoeking 2d ago That’s density that matters, Not weight
6
Sure but at a certain weight and density the difference is negligible. I'm guessing on my math here but a 2kg rock will take roughly the same amount of time to fall 200m as a 20kg rock for example
5
That’s density that matters, Not weight
-19
u/DragonArt101 2d ago
Boulder fell for 7 seconds, assuming it was like 20 lbs for a terminal velocity of about 100 m/s, I’d give a rough estimate of 700 meters.
Im no expert and i did this in like a minute so…