A battery-powered toy drone is flown in a large indoor sports hall. The drone maintains a constant height above the flat floor throughout its flight, though it speeds up, slows down, and stops to hover several times. During the flight, its electric motor becomes warm.
Which type of energy does not change during this flight?
the chemical energy stored in the battery
the gravitational potential energy of the drone
the thermal energy of the motor
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.