Energy is stored in a stretched spring and in a lump of coal.
Which type of energy is stored in each of them?
Stretched spring: elastic potential; Lump of coal: chemical
Stretched spring: elastic potential; Lump of coal: thermal (internal)
Stretched spring: gravitational potential; Lump of coal: chemical
Stretched spring: gravitational potential; Lump of coal: thermal (internal)
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.