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Find the apparent weight of an object fully submerged in water if its volume is 2m^3 and its density is 4000kg/m^3.
 one year ago
 one year ago
Find the apparent weight of an object fully submerged in water if its volume is 2m^3 and its density is 4000kg/m^3.
 one year ago
 one year ago

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dimsonrichelleBest ResponseYou've already chosen the best response.0
I know that apparent weight is the weight that the scale has to support. Also I know there are three forces acting upon the object: buoyancy and tension frm the scale going upwards while the weight is going downwards.
 one year ago

dimsonrichelleBest ResponseYou've already chosen the best response.0
i am just really confused about what equations to use
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
(Gravitionnal) weight = P = mg = Vdg = 2*4000*10=80 000 N
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
Buoyant force = Vd(water)g=2*1000*10=20 000 N
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
So the apparent weight is P(Buoyant Force) = 80 000  20 000 = 60 000 N
 one year ago

dimsonrichelleBest ResponseYou've already chosen the best response.0
so for buoyant force it's always referring to the use of water's density and not the object's density?
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
Yes indeed. Par le principe d'Archimède, ''Tout corps plongé dans un fluide subit de la part de ce fluide une poussée verticale, orientée vers le haut, dont la valeur est égale au poids du volume de fluide déplacé''.
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
Which is french for:
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
A body immersed in a fluid receives from the fluid a vertical thrust, facing upward, whose magnitude equals the weight of the displaced fluid.
 one year ago

raphasuisseBest ResponseYou've already chosen the best response.0
In this case, the fluid is water, so the the buoyancy thrust involves the density of water :)
 one year ago

dimsonrichelleBest ResponseYou've already chosen the best response.0
oh that makes sense. Thank you so much! ^_^
 one year ago
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