In one second, an electric motor has a total energy input of 6200 J.
In one second, 1400 J of energy is wasted as thermal energy transferred to the surroundings.
Calculate the useful energy transferred by the electric motor in one second.
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.