Question detail
If a spring has a spring constant of 200 N/m and is extended by 0.5 m, what is the elastic potential energy stored in the spring?
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. 50 Joules
- B. 100 Joules
- C. 25 Joules
- D. 200 Joules
Answer
50 Joules
Explanation
The correct option is "50 Joules". 50 Joules is right because it answers the Changes in energy objective: Identify elastic potential energy in joules, spring constant in newtons per metre and extension in metres.. The distractors are incorrect because they either use the wrong Physics quantity, confuse an energy store with a transfer, or ignore the wording of this question.
Common mistake
Confusing Units of Measurement
Students often confuse elastic potential energy measured in joules with spring constant measured in newtons per metre.
Remember that elastic potential energy is always expressed in joules, while the spring constant is expressed in newtons per metre. Keep the units distinct when solving problems.
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