An industrial conveyor belt system in a distribution warehouse uses a series of metal rollers to transport heavy packages. The rollers are upgraded by replacing dry-contact steel sleeve bearings with sealed fluid-dynamic bearings containing synthetic oil.
Explain, in terms of energy, how this upgrade improves the efficiency of the conveyor belt system.
38 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.