Question detail
Which option best applies upthrust for Pressure in liquids (physics only) in AQA GCSE Physics Forces?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Pressure and pressure differences in fluids (physics only)
Question
- A. The upward force on an object in a fluid — definition focus for upthrust
- B. This confuses force and pressure and does not answer Pressure in liquids (physics only).
- C. This is too vague because it does not use the force or motion quantity named in the objective.
- D. This reverses the physical cause and effect for Pressure and pressure differences in fluids (physics only).
Answer
The correct answer is: The upward force on an object in a fluid — definition focus for upthrust
Explanation
The correct option is The upward force on an object in a fluid — definition focus for upthrust. The upward force on an object in a fluid — definition focus for upthrust is correct because it matches the approved learning objective to (Physics only) Describe upthrust as the upward force on an object in a fluid. This answer belongs to Pressure in liquids (physics only) within Pressure and pressure differences in fluids (physics only), so it must use precise AQA GCSE Physics forces and motion vocabulary. The other options are wrong because they either confuse force and pressure, omit the required force or motion condition, or move away from the exact subtopic being tested.
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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