Apparent mass (specific gravity)

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SUMMARY

The discussion focuses on calculating the apparent mass of a cork and a lead sinker when both are immersed in water. The cork has a mass of 25 grams and a specific gravity of 0.25, while the lead sinker weighs 266 grams in air. To determine the apparent mass, one must consider the buoyant force acting on both objects when submerged. The solution involves applying Newton's second law and analyzing the forces through a free-body diagram.

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  • Understanding of buoyancy and Archimedes' principle
  • Knowledge of Newton's second law of motion
  • Familiarity with specific gravity calculations
  • Ability to draw and interpret free-body diagrams
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Homework Statement


A piece of cork having a mass of 25 grams in air and a specific gravity of 0.25 is attached to a lead sinker whose mass is 266 grams in air. What will be the apparent mass of the two solids when they are both immersed in water?


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The Attempt at a Solution

 
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To start out, draw a free-body diagram; it might be helpful to consider the sinker+cork as one object. Identify all forces and write out Newton's second law.
 

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