A child pulls a sled to the top of a snowy hill, gaining 12,000 J12{,}000\text{ J}12,000 J of gravitational potential energy. They slide down the hill on the sled. At the bottom of the hill, their kinetic energy is 3500 J.
How much energy was converted into thermal energy and sound energy as the sled moved down the hill?
3500 J3500\text{ J}3500 J
8500 J8500\text{ J}8500 J
12,000 J12{,}000\text{ J}12,000 J
15,500 J15{,}500\text{ J}15,500 J
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.