📘 Motion in a Straight Line – Class 11 Physics (NCERT) This topic explains motion along a straight line (also called one-dimensional motion) as per Class 11 NCERT Physics syllabus. It covers the essential concepts, formulas, and derivations required for CBSE and NEET preparation. 🔍 Key Concepts Displacement (s): Change in position with direction Velocity (v): Speed with direction (vector) Speed: Distance traveled per unit time (scalar) Acceleration (a): Rate of change of velocity Time (t): Total duration of motion 🧾 Equations of Motion (Under Constant Acceleration) The following three equations apply when acceleration is uniform: 1️⃣ First Equation v = u + at 2️⃣ Second Equation s = ut + ½at² 3️⃣ Third Equation v² = u² + 2as 📐 Derivations From definitions: Acceleration: a = (v - u)/t → v = u + at Displacement using average velocity: Average velocity = (u + v)/2 s = [(u + v)/2] × t → ...
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