Question detail
If a spring with a spring constant of 150 N/m is stretched to an extension of 0.4 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
Forces and elasticity
Question
- A. 12 J
- B. 24 J
- C. 30 J
- D. 48 J
Answer
12 J
Explanation
Using the formula Ee = 0.5 x k x e^2, we find Ee = 0.5 x 150 N/m x (0.4 m)^2 = 12 J.
Common mistake
Common Mistake in Elastic Potential Energy Calculation
Students often confuse the extension in the elastic potential energy formula, using total length instead of just the extension from the original length.
Ensure to measure extension as the increase in length from the original length of the spring, not the total length.
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