What you’ll learn3 learning objectivesChoose one objective for a focused lesson, or study the complete topic.13.4.1Gravitational potential at a point as the work done per unit mass in• define gravitational potential at a point as the work done per unit mass in bringing a small test mass from infinity to the pointSyllabus objective13.4.2Φ = –GM / r for the gravitational potential in the field due to a point mass• use ϕ = –GM / r for the gravitational potential in the field due to a point massSyllabus objective13.4.3The concept of gravitational potential leads to the gravitational potential• understand how the concept of gravitational potential leads to the gravitational potential energy of two point masses and use EP = –GMm / rSyllabus objective