d) Upthrust

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Last updated 8:58 PM on 2/27/26
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4 Terms

1
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  • define upthrust

  • the force exerted by a fluid

  • → on a submerged object

  • → against the direction of the object’s weight

2
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  • state the formula for upthrust

  • U = Vρg

    • upthrust acting on an object (N) = volume of the submerged part of the object (m3) × density of the fluid (kgm-3) × acceleration of free fall (ms-2)

3
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  • state Archimedes’ principle

  • whether or not the object is in equilibrium

  • → upthrust exerted on a submerged object = weight of the fluid displaced by the object

4
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  • state what the volume of the displaced fluid is equal to

  • state what the weight of the displaced fluid is equal to

  • the volume of the submerged part of an object

  • the weight of a floating object