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kanishk
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what is the minimum volume of a block of wood (density = 850 kg/m3) if it is to hold a 50 kg person entirely above the water when he stands on it?
 one year ago
 one year ago
kanishk Group Title
what is the minimum volume of a block of wood (density = 850 kg/m3) if it is to hold a 50 kg person entirely above the water when he stands on it?
 one year ago
 one year ago

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kanishk Group TitleBest ResponseYou've already chosen the best response.0
guys help its urgent
 one year ago

theyatin Group TitleBest ResponseYou've already chosen the best response.1
block of 1m^3 would displace 850kg of water i addition a person stands on it its mass will be 900kg so it will displace 900kg of water. so in this case person would be perfectly above water. . . so formula should be mass of block+mass of man=900 so the block should displace atleast 900kg of water so its volume must be around or less than 0.9m^3
 one year ago

kanishk Group TitleBest ResponseYou've already chosen the best response.0
thanks so much
 one year ago

theyatin Group TitleBest ResponseYou've already chosen the best response.1
ok kanishk let me specify why i said less than 0.9m^3 because 0.9m^3 means 850*0.9= 765kg is the mass of block +50kg of mass of man tha is close to 815kg and water displaced is stil 900kgmuch more than required. . . so it must be less than 0.9m^3
 one year ago

theyatin Group TitleBest ResponseYou've already chosen the best response.1
0.850*x+50=x 0.150=50 x=50*1000/150=1000/3 this is the volume of block minimum so that man can float on block. . .
 one year ago
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