Question detail
A battery, motor and lifting load are analysed together. Why is this a valid system?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. They form the chosen group for tracking energy transfers between components.
- B. They are valid only if no work is done by the motor.
- C. They must be separate systems because there are three objects.
- D. They are invalid because batteries cannot be part of a system.
Answer
They form the chosen group for tracking energy transfers between components.
Explanation
A system can include several objects. Here, chemical energy in the battery is transferred electrically to the motor and mechanically to the load, so grouping them helps describe the pathway.
Common mistake
Misunderstanding System Definition
Students often think a system can only be a single object rather than a group of objects considered together.
Emphasize that a system can include multiple objects interacting with each other, not just one.
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