A box is moved to the same shelf by two routes at constant speed. A direct vertical lift requires a force of 180 N through 1.2 m. A ramp requires a force of 75 N through 3.6 m. The extra work on the ramp is transferred to thermal stores. How much extra energy is transferred?
270 J270\ \mathrm{J}270 J
105 J105\ \mathrm{J}105 J
216 J216\ \mathrm{J}216 J
54 J54\ \mathrm{J}54 J
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.