A battery-powered drone flies a delivery route. It maintains a constant altitude throughout the entire flight. During the flight, the drone speeds up, slows down, and hovers at several locations. After some time, its battery and motors become warm.
Which of the following energy stores of the drone system does not change during this flight?
The chemical energy store of the battery
The gravitational potential energy of the drone
The internal (thermal) energy of the motors
The kinetic energy of the drone
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.