A machine feeds a rubber sheet between two rollers. An electric motor connected to the mains supply turns the rollers. The sheet is initially stationary. Friction between the rollers and the sheet makes the sheet move.
Explain how energy is transferred from the mains supply to the kinetic energy store of the sheet.
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.