A2 Physics 9702 | Gravitational Potential Energy | Gravitation

Download Notes: will be uploaded soon *A2 Physics 9702 | Cambridge International A Level Physics* In this lecture, we explore *Gravitational Potential Energy* for Cambridge International A Level Physics (9702), building on the familiar O Level concept and developing the formula used when objects are far from the Earth's surface. We discuss why the familiar formula \(E_p=mgh\) is not suitable for large distances from Earth, where gravitational field strength \(g\) is no longer approximately constant, and introduce the gravitational potential energy formula: Topics covered in this lecture:** Revision of gravitational potential energy and the \(mgh\) formula Why \(mgh\) is unsuitable at large distances from Earth The meaning of infinity in a gravitational field Defining gravitational potential energy relative to infinity Gravitational potential energy at a distance \(r\) from Earth's centre The formula \(E_p=-\frac{GMm}{r}\) and the quantities it represents Change in gravitational potential energy: \(\Delta E_p=-\frac{GMm}{r^2}\Delta r\) in differential form, and the corresponding finite-change relationship How gravitational potential energy changes when an object moves towards or away from a planet The relationship between changes in gravitational potential energy and kinetic energy Reference points and why gravitational potential energy is negative A conceptual summary to prepare for past-paper questions #A2Physics #Physics9702 #CambridgeInternational #GravitationalPotentialEnergy #ALevelPhysics #CAIEPhysic