A winch on a marine research vessel lifts a deep-sea robotic submersible vertically through a distance of 680 m680\text{ m}680 m towards the ocean surface.
The mass of the submersible is 1400 kg1400\text{ kg}1400 kg.
The gravitational field strength is 9.8 N/kg9.8\text{ N/kg}9.8 N/kg.
Calculate the increase in gravitational potential energy of the submersible.
Give your answer to 2 significant figures.
44 exam-style questions on AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.