IB Physics D.1 Gravitational Fields | Concept Tutorial | GradePod (HL)

This is the Higher Level concept tutorial for D.1 Gravitational Fields in the current IB Physics syllabus. It covers everything in the SL tutorial first, then goes further into gravitational potential energy, gravitational potential, equipotential surfaces, and escape speed. If you've already watched the SL version, skip to 25:41 for the HL content. As you watch, tick off each learning objective on the free checklist on the GradePod page below. 👉 Free checklist + full topic page: https://www.gradepod.com/topics/d1-gravitational-fields It's a great way to track what you know and what still needs work. ━━━━━━━━━━━━━━━━━━━━━━━ WHAT'S COVERED IN THIS VIDEO ━━━━━━━━━━━━━━━━━━━━━━━ 0:00 Introduction to Theme D: fields 0:44 Kepler's three laws of orbital motion 4:25 Newton's law of gravitation 9:13 Resultant gravitational field between two bodies 15:00 Gravitational field strength (g = GM/r²) 17:10 Gravitational field lines: radial and uniform fields 25:41 Gravitational potential (HL only) 26:08 Gravitational potential energy (HL only) 30:43 Equipotential surfaces (HL only) 37:51 Escape speed: definition, derivation and formula (HL only) ━━━━━━━━━━━━━━━━━━━━━━━ WANT TO GO FURTHER? ━━━━━━━━━━━━━━━━━━━━━━━ The GradePod Exam Pack gives you everything you need to turn what you've just learned into marks: ✓ Revision note template (build your own notes as you watch, I reference it throughout this video) ✓ Knowledge questions for D.1 Gravitational Fields ✓ Topic-by-topic past paper questions with full mark schemes ✓ Full mock exam, annotated data booklet and Paper 1B practice One-time purchase. £39. Instant download. Every topic included. 👉 Get the Exam Pack: https://www.gradepod.com/exam-pack ━━━━━━━━━━━━━━━━━━━━━━━ NEXT STEP ━━━━━━━━━━━━━━━━━━━━━━━ Once you've watched this video and ticked off your checklist, your next step is the past paper walkthrough. Watch me work through real IB exam questions on Gravitational Fields including the HL potential and escape speed questions: 👉 D.1 Gravitational Fields HL Past Paper Video: https://www.youtube.com/watch?v=Wmhj34Ju6gw ━━━━━━━━━━━━━━━━━━━━━━━ ABOUT GRADEPOD ━━━━━━━━━━━━━━━━━━━━━━━ I'm Sally Weatherly, IB Physics teacher since 2004, Fellow of the Institute of Physics, and founder of GradePod. I built GradePod for the students I couldn't reach in the classroom. Every tutorial is free. No login, no catch. 👉 All 24 topics, free: https://www.gradepod.com/topics ━━━━━━━━━━━━━━━━━━━━━━━ #IBPhysics #IBPhysicsRevision #GradePod #IB #IB2025 #IBPhysicsHL #GravitationalFields #EscapeSpeed #GravitationalPotential #Fields