DOUBT CLASS XI TOPICS COVERED MOTION IN A VERTICAL CIRCLE, PERFECTLY INELASTIC COLLISION

Satish Kumar: https://jhhkut.on-app.in/app/home?org... [20-09-2026 19:28] Satish Kumar: Master 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 Takeaways ​📚 Helpful Resources & Links ​📥 Download the lecture notes / PDF: [Insert Link Here] ​🎯 Mechanics & Rotational Motion Playlist: [Insert Playlist Link] ​💬 Join our Discordhttps://jhhkut.on-app.in/app/home?org...