Question detail
Which calculation would give the amount of elastic potential energy stored in a spring that has been stretched 0.10 m with a spring constant of 200 N m⁻¹?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Forces and elasticity
Question
- A. F = k × e
- B. E = 0.5 × k × e²
- C. P = V × I
- D. W = F × s
Answer
E = 0.5 × k × e²
Explanation
Elastic potential energy is calculated with E = 0.5 × k × e². The other options calculate force, electrical power, or work, not elastic potential energy.
Common mistake
Confusing Calculations
Students often confuse force-extension calculations with elastic potential energy calculations, leading to incorrect results.
To fix this, clearly identify whether you are calculating force using Hooke's law (F = k * e) or elastic potential energy (Ee = 0.5 * k * e^2) and ensure you use the correct formula for each scenario.
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