Black holes are objects with an intense gravitational pull so strong that not even beams ... General relativity’s equations fail catastrophically at a black hole’s centre, known as its ...

Gravitational potential energy is the energy ... In lifting the suitcase, you would have to pull upwards on it with a force equal in size to its weight, \(mg\).

The weight of an object is the force on it due to the gravitational pull of gravity at that point ... We can calculate weight using the following formula.