1the balancing force in case of blade is surface tension ...which depends on the perimeter....and dats sam in both cases
Which of the following shapes is better for a blade to float?
Note: This is my own question.. I have an opinion and an answer.. But your answers are most welcome... I want to see this one more as a discussion than as a yes or no answer....
Everyone is welcome :)
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62That is what i was thinking too... (This one got murdered :D)
but now give a second thought...
what about buoyant force?
1it is has it floats on the surface...no part will immeresed .......bouyant force will be 0....
3sir wat i think is the material in which the blades are made of steel and its of very low density,so we may not worry much about buoyancy,surface tension has more effect on the blades,In a blade with holes the blade will experience more surface tension (force per unit length),than that of blade without holes.So the blade with holes will be more likely to be pulled towards the liquid,so it has less tendency to float.
62@ sankara.. does metal have low density?
is surface tension trying to pull the blade towards the liquid or the other way?
@ xyz.. i know i messed up in that question :(
1the point is that a blade is more or less two dimensional.
such objects usually do not experience much buoyancy.
1@philip bouyant force will be exactly 0 as the blade wont displace any water
1i too think surface tension will cause the blade with holes to float as the total length is more....
wts ur opinion bro???
1n u said that the surface tension got murdered...so can u tell us who the murderer is..i mean whts the reaason that this explanation wont hold??
62There are 2 factors that I can think of..
some of you pointed out that bouyant force will be zero..
but that will not exactly be true.. because when the blade has surface tension, it will change teh geometry of the water.. so water will get depressed inspite of the fact that the thickness of blade is zero (almost)
Moreover the force due to gravity will be lesser and the surface tension will be higher..
all these factors lead to the second blade floating more easily. (not the bouyancy one!)
Can someone think of more reasons?