An electric winch motor is used to pull a boat up a slipway. Explain why the efficiency of this motor is less than 100%.
Practise Edexcel GCSE Physics Efficiency and energy resources with exam-style questions for Foundation and Higher tier. 73 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.