A motor raises a rescue cage. The cage is at rest at the start and at the end of the raise. The motor is then disengaged, and a brake controls the cage as it is lowered to a platform below its highest point. The cage is at rest at the start and at the end of the descent.
The table shows some measurements for the journey.
| Measurement | Energy in kJ |
|---|---|
| Energy supplied electrically to the motor during the raise | 30 |
| Increase in the gravitational store of the cage during the raise | 24 |
| Decrease in the gravitational store of the cage during the descent | 16 |
Explain what happens to the 30 kJ of energy supplied, from the start of the raise until the cage comes to rest on the platform.
Use all the measurements in the table in your answer.
121 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.