A technician pushes a stone display plinth between two locations on a level gallery floor. The plinth moves at constant speed. On each section, the pushing force is constant and acts in the direction of movement. Work done against friction is transferred to the thermal energy stores of the plinth and the floor.
| Route | Floor section | Distance | Pushing force |
|---|---|---|---|
| A | polished floor | 4.0 m | 55 N |
| A | protective mat | 150 cm | 120 N |
| B | textured floor | 6.4 m | 72 N |
Calculate the difference between the energy transferred to the thermal energy stores on route A and on route B. State which route transfers more energy.
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.