A metal pendulum bob is released from a height of 45 cm above its resting position.
Explain why, on its return swing, the bob does not reach its starting height of 45 cm.
82 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.