Homework Help: physics

Posted by C on Saturday, March 31, 2012 at 9:26am.

Estimate the buoyant force that air exerts on you. (To do this, you can estimate your volume by knowing your weight and by assuming that your weight density is a bit less than that of water.) Assume that your weight is a about 1000 N, for example.

physics - Elena, Saturday, March 31, 2012 at 1:43pm
Density of man is D = 1000 kg/m^3,
m•g =V•D•g = 1000 N
The man's volume
V = 1000/( D•g) =1000/(1000•9.8) =0.1020408 m^3

Density of air d = 1.2929 kg/m^3
The buoyant force is equal to the weight of the air
displaced by the man
F =V•d•g =0.1020408•1.2929•9.8•1.2929 N
physics - Kristie, Sunday, April 1, 2012 at 10:44pm
it is telling me its wrong

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