Periodic Motion ≠ SHM | Biggest Mistake in NCERT Ex 14.2 (JEE NEET) скачать в хорошем качестве

Periodic Motion ≠ SHM | Biggest Mistake in NCERT Ex 14.2 (JEE NEET)

Periodic Motion vs Simple Harmonic Motion (SHM) — explained using NCERT Class 11 Oscillations Exercise 14.2. This question confuses most students in JEE & NEET. In this video, each option is analysed using physical reasoning, not memorisation. NCERT Class 11 Physics | Oscillations — Exercise 14.2 Question discussed: Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion? Examples covered: • Rotation of Earth about its axis • Oscillating mercury column in a U-tube • Ball bearing inside a smooth curved bowl • Vibrations of a polyatomic molecule 0:55 Condition for SHM (restoring force ∝ displacement) 2:28 Earth’s rotation — why NOT SHM 3:44 Mercury column in U-tube — perfect SHM 11:29 Ball in curved bowl — nearly SHM explained 18:49 Polyatomic molecule vibrations — why NOT SHM What you will clearly understand after this video: ✔ Difference between periodic motion and SHM ✔ Why uniform circular motion is NOT SHM ✔ Why mercury column shows true SHM ✔ Why ball in a bowl is only nearly SHM ✔ Why polyatomic molecular vibrations are NOT SHM This explanation is fully aligned with NCERT and is extremely important for JEE & NEET conceptual questions.