An electric drill is used to drill a hole in a wall.
Explain how energy is dissipated when the drill is used, and how the unwanted energy transfers in the drill could be reduced.
100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.