Calculate Specific Gravity: Weight, Buoyant Force & Density

[nixxie]

question...

A body weighs 80N in air and 60N in water. a) what is the weight of the water displaced bythe body?
b) The buoyant forces of water on the body
c) The specific gravity if the body>
d) The dnsity of the body in kg/m3 and g/cm3

cant answer this.. please i need help ;) thanks!

 

[pureouchies4717]

for question c:F(in Newtons)= mass x acceleration (in this case, gravity)

for the first one, it is on land. on land, the acceleration(gravity) is always 9.8m/s^2

so you can find the mass of the object

80= m x 9.8

now that you have the mass of the object, find the gravity for the object in the water

60N= m x g(the variable you are trying to find)

 

[Hootenanny]

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