A simple harmonic oscillator has amplitude A = 0.10 m and spring constant k = 200 N/m. What is its total mechanical energy?
Answer and explanation
Correct answer: B. 1.0 J
- Step 1: Total energy in SHM: E = (1/2) k A^2. Step 2. E = (1/2) 200 (0.10)^2 = 100 0.010 = 1.0 J. Answer: 1.0 J. Why not the others:* 2.0 J forgets the 1/2 factor; 20.0 J uses A instead of A^2.
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