Question detail
If a spring has a spring constant of 200 N/m and is extended by 0.5 m, what is the force applied to 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. 100 N
- B. 200 N
- C. 300 N
- D. 400 N
Answer
100 N
Explanation
Using Hooke's law (F = k * e), where F is the force, k is the spring constant (200 N/m), and e is the extension (0.5 m), the force is calculated as 200 N/m * 0.5 m = 100 N.
Common mistake
Misunderstanding Proportionality
Students often confuse the relationship between force and extension, thinking that extension is proportional to force beyond the limit of proportionality.
Remember that extension is only directly proportional to force up to the limit of proportionality; beyond this point, the relationship changes.
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