Rach_69 Posted February 21, 2005 Report Share Posted February 21, 2005 Does anyone know the formula for buoyancy as i dont seem to be able to find iti know its p= (roe) gh for the top and then the bottom but what else is to it?My exam is at 1 Quote Link to comment Share on other sites More sharing options...
Porter Posted February 21, 2005 Report Share Posted February 21, 2005 To find the upthrust you take the pressure at the bottom away from the pressure at the top (using p=roe g h to find the pressure) Then the difference in pressures is the upthrust... or at least i think thats it...xxx Quote Link to comment Share on other sites More sharing options...
Rach_69 Posted February 21, 2005 Author Report Share Posted February 21, 2005 and is the upthrust all you need to know? i mean you dont have to work out anything further than that? Quote Link to comment Share on other sites More sharing options...
Porter Posted February 21, 2005 Report Share Posted February 21, 2005 Well its the only thing you need to work out as far as boyancy force is concerned.. however, sometimes they can be pretty sneeky and decided to change it into an unbalanced forces question, in which case all you need to do is use fun=m x a and just remeber that weight is a force as well. Any more questions?xxx Quote Link to comment Share on other sites More sharing options...
Addi Posted February 21, 2005 Report Share Posted February 21, 2005 i think i failed higher physics twice. Quote Link to comment Share on other sites More sharing options...
psydoll Posted February 21, 2005 Report Share Posted February 21, 2005 and is the upthrust all you need to know?You just make it too easy lass EDIT: Good luck in the exam mind Quote Link to comment Share on other sites More sharing options...
Camie Posted February 21, 2005 Report Share Posted February 21, 2005 in which case all you need to do is use fun=m x a and just remeber that weight is a force as well. Any more questions?xxxor as st machar standard grade physics class used to call it fun= yer ma... Quote Link to comment Share on other sites More sharing options...
Rach_69 Posted February 21, 2005 Author Report Share Posted February 21, 2005 You just make it too easy lass EDIT: Good luck in the exam mind i didnt even think of that!guh!thanks very much for the helpthe exam wasnt as hard as i thought it would be but i still dont think i did too well in itah well, only the prelim but that means ive still got the real thing to go in May Quote Link to comment Share on other sites More sharing options...
Tav Posted February 21, 2005 Report Share Posted February 21, 2005 <shakes head> Quote Link to comment Share on other sites More sharing options...
Guest haigyman Posted February 21, 2005 Report Share Posted February 21, 2005 i didnt even think of that!guh!thanks very much for the helpthe exam wasnt as hard as i thought it would be but i still dont think i did too well in itah well' date=' only the prelim but that means ive still got the real thing to go in May [/quote']don't worry, i'm not even going to bother Quote Link to comment Share on other sites More sharing options...
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