A shopper pushes a loaded trolley 25 m across a level car park. The shopper applies a constant horizontal force of 18 N in the direction in which the trolley moves. How much energy is transferred by the shopper's force?
45 J45\ \mathrm{J}45 J
450 J450\ \mathrm{J}450 J
4.5 kJ4.5\ \mathrm{kJ}4.5 kJ
450 N450\ \mathrm{N}450 N
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.