An automated cutter is supplied with 4.0 kJ of energy. Its Sankey diagram has three output arrows. The table gives the widths of two of the output arrows and the input arrow.
| Energy transfer | Arrow width |
|---|---|
| input to the cutter | 80 mm |
| to thermal energy stores | 18 mm |
| by sound waves | 2 mm |
The third output transfers energy mechanically to the cutting blade. To make one cut, the blade moves 6.0 mm against a constant resistive force of 25 kN25\ \mathrm{kN}25 kN.
Calculate the maximum number of complete cuts that the cutter can make using the energy supplied.
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.