Which row about the change of energy in the energy store must be correct?
| Process | Energy store | Change of energy in store | |
|---|---|---|---|
| A | An electric motor lifting a heavy load at a constant speed | Gravitational potential store of the load | Increases |
| B | An electric motor lifting a heavy load at a constant speed | Kinetic store of the load | Increases |
| C | A bungee jumper falling downwards before the cord stretches | Gravitational potential store of the jumper | Increases |
| D | A bungee jumper falling downwards before the cord stretches | Elastic potential store of the cord | Increases |
Row A
Row B
Row C
Row D
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.