Exam-style question
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What is the total mechanical energy of a system if the potential energy is 300 J and the kinetic energy is 200 J?.
- A.500 J
- B.300 J
- C.200 J
- D.100 J
Model answer
What a good answer should say
- 500 J
Explanation
Why this works
The total mechanical energy is the sum of potential and kinetic energy. Thus, total energy = 300 J + 200 J = 500 J.
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