Which row about the change of energy in the energy store must be correct?
| Process | Energy store | Change of energy in store | |
|---|---|---|---|
| A | A block sliding down a rough ramp | Thermal energy of the block and ramp | Decreases |
| B | A block sliding down a rough ramp | Gravitational potential energy of the block | Decreases |
| C | An electric motor lifting a load at a constant speed | Kinetic energy of the load | Increases |
| D | An electric motor lifting a load at a constant speed | Gravitational potential energy of the load | Decreases |
A
B
C
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.