NCERT AND PYQ CBSE BASED ON LC, LR, CR, LCR SERIES CIRCUIT PHYSICS ALTERNATING CURRENT

NCERT AND PYQ CBSE BASED ON LC, LR, CR, LCR SERIES CIRCUIT PHYSICS ALTERNATING CURRENTMaster core mechanics concepts in this comprehensive physics revision session! In this lecture, we break down four essential topics step-by-step: Motion in a Vertical Circle, Perfectly Inelastic Collisions, Apparent Weight in an Elevator/Lift, and the Rotational Equations of Motion. ​Whether you are preparing for high school exams, CBSE Board Class 11, NEET, or JEE, this video provides standard derivations, free-body diagrams (FBDs), and real-world problem-solving tips to make these concepts stick. ​📌 What You Will Learn ​Motion in a Vertical Circle ​Critical velocity conditions at the bottom, top, and horizontal positions (\sqrt{5gr}, \sqrt{gr}, \sqrt{3gr}) ​Tension variation along the path and condition to loop the loop without slacking ​Conservation of mechanical energy applied to circular motion ​Perfectly Inelastic Collision ​Conservation of linear momentum when two bodies stick together ​Derivation for common final velocity (v) ​Calculation of loss in kinetic energy during the impact ​Apparent Weight in a Lift / Elevator ​Understanding normal force as apparent weight ​Elevator at rest / moving at constant velocity (N = mg) ​Upward acceleration (N = m(g + a)) vs. downward acceleration (N = m(g - a)) ​The physics of free fall and zero gravity / weightlessness ​Rotational Equations of Motion ​Linear vs. rotational kinematic analogies (s \leftrightarrow \theta, u \leftrightarrow \omega_0, v \leftrightarrow \omega, a \leftrightarrow \alpha) ​Applying the rotational kinematic formulas (\omega = \omega_0 + \alpha t, \theta = \omega_0 t + \frac{1}{2}\alpha t^2, \omega^2 = \omega_0^2 + 2\alpha\theta) ​Common numerical problem patterns and sign conventions ​⏱️ Timestamps / Chapters ​00:00 - Introduction & Overview ​01:15 - Motion in a Vertical Circle: Critical Velocity & Tension ​10:45 - Perfectly Inelastic Collision & Kinetic Energy Loss ​19:30 - Apparent Weight in an Elevator (All 4 Cases & Weightlessness) ​28:50 - Rotational Equations of Motion & Linear Analogies ​37:20 - Solved Practice Examples & Key Takeaway