A-Level Physics Specification

Edexcel 9PH0

Section 12: Gravitational Fields

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#12.174

understand that a gravitational field (force field) is defined as a region where a mass experiences a force

#12.175

understand that gravitational field strength is defined as \(g = \dfrac{F}{m}\) and be able to use this equation

#12.176

be able to use the equation \(F = \dfrac{Gm_1m_2}{r^2}\) (Newton’s law of universal gravitation)

#12.177

be able to derive and use the equation \(g = \dfrac{Gm}{r^2}\) for the gravitational field due to a point mass

#12.178

be able to use the equation \(V_{grav} = \dfrac{-Gm}{r}\) for a radial gravitational field

#12.179

be able to compare electric fields with gravitational fields

#12.180

be able to apply Newton’s laws of motion and universal gravitation to orbital motion.