EnergyHardQuestion 31140
Question
At what phase angle (ωt + φ) does KE = 75% of total energy?
- A30°Correct
- B45°
- C60°
- D90°
Correct answer
30°
Explanation
KE/E = cos²(ωt+φ) = 0.75. cos(ωt+φ) = √0.75 = √3/2 → ωt+φ = 30°.
JEE Physics · Hard
Simple Harmonic Motion: Energy MCQ
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