Question detail
Work done and energy transfer scenario: a force meter stretches a spring and the extension is measured. Which answer best addresses Work done by a force and the objective to explain that work done against friction transfers energy to thermal stores?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Work done and energy transfer
Question
- A. In the spring test scenario, apply work done to explain that work done against friction transfers energy to thermal stores while keeping scalar versus vector quantities separate.
- B. In the spring test scenario, mix up scalar versus vector quantities and ignore work done.
- C. Use a general revision statement without applying Work done by a force to the situation.
- D. Choose a different forces topic instead of explaining explain that work done against friction transfers energy to thermal stores.
Answer
The correct answer is: In the spring test scenario, apply work done to explain that work done against friction transfers energy to thermal stores while keeping scalar versus vector quantities separate.
Explanation
The correct option is In the spring test scenario, apply work done to explain that work done against friction transfers energy to thermal stores while keeping scalar versus vector quantities separate.. It is correct because the scenario says a force meter stretches a spring and the extension is measured, which must be interpreted through Work done by a force. This directly supports the learning objective to explain that work done against friction transfers energy to thermal stores. Use values 8, 7, 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 scalar versus vector quantities.
Common mistake
Misunderstanding Work Done Against Friction
Students often confuse the concept of work done against friction with the total energy transferred, failing to recognize that this work specifically results in energy being transferred to thermal stores.
To fix this, students should focus on the definition of work done as energy transferred when a force moves an object, and specifically understand that work done against friction leads to an increase in thermal energy.
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