Question detail
A different spring has k = 80 N/m and extension e = 0.7 m. Which substitution keeps the elastic energy equation correct?
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. Ee = 0.5 � 80 � 0.7� = 19.6 J
- B. Ee = 80 � 0.7� = 39.2 J
- C. Ee = 0.5 � 80 � 0.7 = 28 J
- D. Ee = 80 � 0.7 = 114 J
Answer
Ee = 0.5 � 80 � 0.7� = 19.6 J
Explanation
The correct option is "Ee = 0.5 � 80 � 0.7� = 19.6 J". It is right because the elastic potential energy formula includes both the half factor and the squared extension.
Common mistake
Misunderstanding Elastic Potential Energy Calculation
Students often confuse the elastic potential energy formula Ee = 0.5 x k x e^2 by misidentifying the spring constant (k) and extension (e).
Ensure to correctly identify k as the spring constant in N/m and e as the extension in meters before substituting values into the formula.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.