Question detail
What is upthrust and how does it affect an object submerged in a fluid Explain your answer using Pressure in liquids (physics only) and upthrust.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
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Topic
Pressure and pressure differences in fluids (physics only)
Question
What is upthrust and how does it affect an object submerged in a fluid Explain your answer using Pressure in liquids (physics only) and upthrust.
Answer
Upthrust is the upward force exerted by a fluid on an object that is submerged in it. This force acts against the weight of the object, and if the upthrust is greater than the weight, the object will float; if it is less, the object will sink.
Explanation
A strong answer should address (Physics only) Describe upthrust as the upward force on an object in a fluid directly. Use the context of Pressure in liquids (physics only) within Pressure and pressure differences in fluids (physics only), then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps force and pressure distinct, and links the conclusion back to the approved learning objective.
Common mistake
Misunderstanding Upthrust
Students often confuse upthrust with buoyancy, thinking they are the same concept.
Clarify that upthrust is the upward force exerted by a fluid on a submerged object, while buoyancy refers to the overall effect of upthrust and the weight of the object.
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