Figure shows a smooth track, a part of which is a circle of radius R. A block of mass m is pushed ..

Figure shows a smooth track, a part of which is a circle of radius R. A block of mass m is pushed against a spring of spring constant k fixed at the left end and is then released. Find the initial compression of the spring so that the block presses the track with a force mg when it reaches the point P where the radius of the track is horizontal. JEE/NEET PYQ | Spring + Circular Motion + Energy Conservation | Most Expected Physics Question In this video, we solve a highly conceptual Physics PYQ involving Spring Potential Energy, Circular Motion, Centripetal Force, Normal Reaction, and Conservation of Mechanical Energy. A block is launched using a compressed spring and moves on a smooth track containing a circular section. The challenge is to find the required spring compression when the block exerts a force equal to mg on the track at a specific point. Although the question looks simple, it contains a hidden circular-motion concept that many students miss in exams. 📌 Concepts Covered: ✔ Spring Potential Energy ✔ Work-Energy Theorem ✔ Conservation of Mechanical Energy ✔ Circular Motion ✔ Centripetal Force ✔ Normal Reaction Force ✔ JEE Main Physics ✔ NEET Physics ✔ Class 11 Physics Mechanics 🎯 In this video you will learn: • How to identify the centripetal force at any point of a circular track • Why weight does not contribute to centripetal force at point P • How to find speed using circular-motion concepts • How to combine Circular Motion and Energy Conservation in a single problem • Fast exam-oriented approach for JEE Main and NEET 📚 Suitable For: ✅ JEE Main Aspirants ✅ NEET Aspirants ✅ Class 11 Students ✅ Physics Olympiad Beginners ✅ Board + Competitive Exam Preparation 📢 If you enjoy concept-based Physics PYQs, make sure to: 👍 Like the Video 💬 Comment Your Answer Before Watching the Solution 📤 Share with Friends 🔔 Subscribe to Pacificclasses4U for more JEE/NEET Physics content #JEEPhysics #NEETPhysics #PhysicsPYQ #CircularMotion #SpringMassSystem #EnergyConservation #JEEMain2026 #NEET2026 #Mechanics #PhysicsProblems #Class11Physics #PhysicsTricks #Pacificclasses4U #CentripetalForce #WorkEnergyTheorem #JEEPreparation #NEETPreparation #PhysicsNumericals #PYQSolution #PhysicsConcepts