Question detail
Pressure and pressure differences in fluids (physics only) scenario: a force meter stretches a spring and the extension is measured. Which answer best addresses Pressure in liquids (physics only) and the objective to (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects?
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. In the spring test scenario, apply pressure difference to (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects while keeping force versus pressure separate.
- B. In the spring test scenario, mix up force versus pressure and ignore pressure difference.
- C. Use a general revision statement without applying Pressure in liquids (physics only) to the situation.
- D. Choose a different forces topic instead of explaining (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects.
Answer
The correct answer is: In the spring test scenario, apply pressure difference to (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects while keeping force versus pressure separate.
Explanation
The correct option is In the spring test scenario, apply pressure difference to (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects while keeping force versus pressure separate.. It is correct because the scenario says a force meter stretches a spring and the extension is measured, which must be interpreted through Pressure in liquids (physics only). This directly supports the learning objective to (Physics only) Explain why pressure differences in a liquid produce an upwards force on submerged objects. Use values 3, 5, and 15 only if the question asks for a calculation. The answer earns credit by naming the relevant force or motion quantity, using units when needed, and avoiding the boundary error force versus pressure.
Common mistake
Understanding Upthrust
Students often confuse the concept of upthrust with the overall weight of the object, thinking that upthrust is simply the weight of the object in the fluid.
Clarify that upthrust is the upward force exerted by the fluid, which is equal to the weight of the fluid displaced by the submerged part of the object. Emphasize the relationship between pressure differences and the resultant force acting upwards. In Pressure in liquids (physics only), correct the mistake by naming the relevant force or motion quantity and checking force and pressure.
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