Question detail
Pressure and pressure differences in fluids (physics only) scenario: liquid pressure increases with depth below the surface. Which answer best addresses Pressure in liquids (physics only) and the objective to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above?
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 fluid depth scenario, apply physics only to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above while keeping mass versus weight separate.
- B. In the fluid depth scenario, mix up mass versus weight and ignore physics only.
- 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 that pressure in a liquid is caused by the weight of liquid above.
Answer
The correct answer is: In the fluid depth scenario, apply physics only to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above while keeping mass versus weight separate.
Explanation
The correct option is In the fluid depth scenario, apply physics only to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above while keeping mass versus weight separate.. It is correct because the scenario says liquid pressure increases with depth below the surface, which must be interpreted through Pressure in liquids (physics only). This directly supports the learning objective to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above. Use values 5, 8, and 22 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 mass versus weight.
Common mistake
Confusing liquid pressure with atmospheric pressure
Students often think that the pressure at a point in a liquid is the same as the atmospheric pressure above the liquid surface, ignoring the additional pressure from the weight of the liquid column.
Explain that liquid pressure at depth is the sum of the atmospheric pressure at the surface and the hydrostatic pressure from the weight of the liquid above, calculated as p = ρgh. Emphasise that the weight of the liquid column adds to the atmospheric pressure, not replaces it. In Pressure in liquids (physics only), correct the mistake by naming the relevant force or motion quantity and checking mass and weight.
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