A winch does 1.8 kJ of work pulling a crate along a level floor. The constant pulling force is 150 N. The crate has already moved 4.0 m when a marker is placed beside it. How much further does it move before the winch has done the full 1.8 kJ of work?
8.0 m8.0\ \mathrm{m}8.0 m
12 m12\ \mathrm{m}12 m
450 m450\ \mathrm{m}450 m
16 m16\ \mathrm{m}16 m
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.