An instructor demonstrates four actions with gym equipment. Which action increases an elastic potential energy store?
Raising a dumbbell from the floor onto a rack
Pulling a resistance band so it stretches and holding it
Pedalling an exercise bicycle so its flywheel rotates faster
Rubbing their hands together so their temperature rises
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.