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