A diver of mass 50 kg leaves a platform moving vertically downwards at 2.0 m/s. The diver then falls a further 4.0 m vertically. During this fall, 80 J is transferred to thermal stores of the surroundings. Use g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg.
Calculate the diver's speed after falling the 4.0 m.
121 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.