Is there a formula for this? if object is 300m deep, 30m in diameter, 50,000kg, in a ball shape how long will it take to reach surface?
ok, good to know the calculations i used are correct. Maybe I'm off on this but a 30 ft in diameter sphere weighing 50,000 kg doesn't seem that light or buoyant to me. maybe i am missing something.
Your own calculation implies that the net acceleration is about 10g. A typical space rocket has about 3g. So your ball will be raising very fast - so fast, that the viscosity of water will need to be taken into account if you want to model the reality closely.
awesome, thanks xodin, that was exactly what i needed. 250,000 of iron would give a density of ~10cm which should hold at 1k ft depth when compared with your example. Also the ball would be rising at an average leisurely speed of 3.6mph (I am aware that none of this includes viscosity)
If someone would like to share how to include viscosity that would be fine, if not or if I am being too vague, please don't bother. I can accept this estimate is the best I can do for now and assume that my estimates are inaccurate but hopefully within the ballpark.
i meant thickness of shell not density, your right.
i calculated speed based on the fact that i know the object travels ~984 feet and i know it takes ~200 seconds... is that a correct options for estimating speed?
ya i was sloppy and just guestimated my conversion of seconds to minutes... i changed it to be exact and got 3.35. again thanks for the help and double checking me.
Yep, exactly. Though it's fun to play around our ideal scenario, all of this is horribly inaccurate without taking viscosity into account. Does someone know how to do that? From the little I know about it, I believe it's very complex.