Calculate Weight of "Weightless" Ichthyosaurus in Metric Tonnes

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To calculate the weight of a "weightless" ichthyosaurus with a volume of 3m^3, the relevant equation involves buoyancy, which is equal to the volume multiplied by the density of the liquid displaced and gravitational acceleration. Using a density of 1000 kg/m^3 for fresh water and gravitational acceleration of 9.81 m/s^2, the buoyant force can be calculated. This results in a buoyant force of approximately 29.43 kN, which translates to a weight of about 2.94 metric tonnes. The discussion clarifies that "weightless" refers to the buoyancy effect rather than an absence of weight. Understanding these principles is crucial for accurately determining the ichthyosaurus's weight in water.
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Homework Statement


Fossilized ichthyosaurus remains enable us to estimate their volume. If we assume that a
3m^3 icthyosaurus was "wightless" when it swam under water. What was its weight in metric tonnes?

Homework Equations


B=Wdisp. lqd ??



The Attempt at a Solution


B=V x density x g
g=9.81
density= 1000 kg/m^3 (assuming fresh water)
V=3m^3

plugging this into the equation would give me B .. not weight??
 
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Weightless means
mg = weight of the displaced liquid.
 

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