A-Level Physics Specification

OCR A H556

Section 5.4.4: Gravitational potential and energy

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#5.4.4a

gravitational potential at a point as the work done in bringing unit mass from infinity to the point; gravitational potential is zero at infinity

#5.4.4b

gravitational potential \(V_g = -\dfrac{GM}{r} \) at a distance r from a point mass M; changes in gravitational potential

#5.4.4c

force–distance graph for a point or spherical mass; work done is area under graph

#5.4.4d

gravitational potential energy \(E = mV_g = -\dfrac{GMm}{r} \) at a distance r from a point mass M

#5.4.4e

escape velocity.