OCR A level Physics: Gravitational Fields

OCR A level Physics: Gravitational Fields is apart of the Module 5: Newtonian world and Astrophysics. All presentations come with worked examples, solutions and homeworks. 18.1 Gravitational Fields 18.2 Newton's law of gravitation 18.3 Gravitational field strength for a point mass 18.4 Kepler's laws 18.5 Satellites 18.6 Gravitational potential 18.7 Gravitational potential energy * The terms: eccentricity, aphelion, perihelion, astronomical unit * Kepler’s First Law * Kepler’s Second Law * Kepler’s Third Law * Graphs of T^2 against r^3 to determine the gradient (constant of proportionality, k). * Equating (4π)^2/𝐺𝑀 to the gradient (constant of proportionality, k) * Key features of geostationary and low polar orbit satellites * Conditions for stable orbits for satellites * Applying Kepler’s laws to the orbits of satellites * Radial and uniformed field * Definition of gravitational potential energy * Deriving escape velocity * Force-Distance graphs for gravitational fields * Center of mass and treating spherical objects as point masses * Gravitational fields * Definition of gravitational potential * Applying the gravitational potential equation * Graph of gravitational potential against distance (V against r) * Combining gravitational potentials from more than one mass