Question detail
What is the unit of spring constant?
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. N/m
- B. J/kg
- C. kg/m
- D. N
Answer
N/m
Explanation
The spring constant is measured in newtons per metre (N/m), indicating the force required to stretch or compress the spring by one metre.
Common mistake
Misunderstanding Gradient
Students often confuse the gradient of a force-extension graph with the total extension, thinking it represents the overall length change rather than the spring constant.
Emphasize that the gradient of the linear section of the graph represents the spring constant, which is the ratio of force to extension, not the total extension itself.
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