Question detail

Pressure and pressure differences in fluids (physics only) scenario: air resistance changes until terminal velocity is reached. Which answer best addresses Pressure in liquids (physics only) and the objective to (Physics only) Explain floating and sinking in terms of weight and upthrust?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Pressure and pressure differences in fluids (physics only)

Question

A. In the parachutist scenario, apply upthrust to (Physics only) Explain floating and sinking in terms of weight and upthrust while keeping mass versus weight separate.
B. In the parachutist scenario, mix up mass versus weight and ignore upthrust.
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 floating and sinking in terms of weight and upthrust.

Answer

The correct answer is: In the parachutist scenario, apply upthrust to (Physics only) Explain floating and sinking in terms of weight and upthrust while keeping mass versus weight separate.

Explanation

The correct option is In the parachutist scenario, apply upthrust to (Physics only) Explain floating and sinking in terms of weight and upthrust while keeping mass versus weight separate.. It is correct because the scenario says air resistance changes until terminal velocity is reached, which must be interpreted through Pressure in liquids (physics only). This directly supports the learning objective to (Physics only) Explain floating and sinking in terms of weight and upthrust. Use values 3, 12, 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

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 weight on an object's ability to float or sink. 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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