A spring-loaded carriage is released and moves inside a sealed enclosure. The carriage, spring and enclosure are treated as a closed system. The only stores that change are the elastic potential, kinetic and thermal energy stores.
| Energy store | Energy before release | Energy after release |
|---|---|---|
| Elastic potential energy store of the spring | 480 J | 160 J |
| Kinetic energy store of the carriage | 0 J | 250 J |
| Thermal energy store of the enclosure | 120 J | XXX |
Calculate XXX.
115 exam-style questions on Edexcel GCSE Physics 8.1 Energy transfers and work, covering 8.1.1 Energy stores and transfer diagrams, 8.1.2 Ways of changing a system's energy, and 8.1.3 Work done by forces. Each one has a worked solution and a mark scheme showing where the marks go.