Motion Under Gravity Class 11 | Galileo's 1:3:5:7 Trick & Full Concepts | NEET/JEE Physics | Lec 04

Class 11 Physics - Chapter 3: Motion in a Straight Line (1D Kinematics) Topic: Motion Under Gravity (Complete Concepts, Formulas, Short Tricks & PYQs) Is video lecture me Motion Under Gravity ke sabhi core concepts, derivations aur competitive tricks ko first principles se detail me cover kiya gaya hai: 00:00 - Introduction & Concept of Motion Under Gravity 01:30 - Key Assumptions (Air Resistance, g Constant, Earth's Rotation) 07:46 - Sign Convention & Origin Concept 09:15 - Case 1: Bottom to Top (Time to Top & Max Height) 13:37 - Case 2: Free Fall & Collision Velocity 17:37 - Forced Fall Concept 18:31 - Galileo's Odd Number Law (1:3:5:7 Shortcut Trick) 26:09 - Case 3: Ball Thrown from Height/Tower 30:07 - Quadratic Equation Method for Time of Flight 32:42 - 1-Second Step Velocity & Displacement Shortcut 38:15 - Symmetric Motion & Dual Time Formulas (t1, t2) 41:29 - Numerical 1: Balcony Problem (t1=3s, t2=5s) 43:42 - Numerical 2: Distance in Last Second vs First 3 Seconds 📌 Topics Covered in This Lecture: • Core Assumptions of Motion Under Gravity • Universal Sign Convention (Single Reference Rule) • Case 1: Bottom to Top (Time & Velocity Symmetry, Dual Crossing Height Shortcut) • Case 2: Top to Bottom (Free Fall vs Forced Fall & Galileo's Odd Number Law) • Case 3: Top to Top to Bottom (Tower Projection & Three-Body Relation t3 = √(t1·t2)) • Advanced NEET/JEE Traps: Water Tap Problems, Relative Motion in Gravity (arel = 0) & Graphs (y-t, v-t, speed-t) • High-Yield Exam PYQs with Step-by-Step Solutions Key Highlights & Shortcuts: ✔ Galileo’s Law of Odd Numbers: 1 : 3 : 5 : 7 ratio ✔ Tower Projection Relation: t3 = √(t1 × t2) ✔ Dual Crossing Height Formula: h = (1/2)g·t1·t2 ✔ Relative acceleration in gravity is always ZERO (arel = 0) Target Audience: NEET, JEE Main, JEE Advanced, Class 11 CBSE/State Boards Don't forget to Like, Share, and Subscribe for more conceptual Physics lectures and problem-solving sessions! #MotionUnderGravity #Class11Physics #NEETPhysics #JEEPhysics #Kinematics #PhysicsTricks #NEET2027 #JEE2027