A toy car initially has 18 J in its kinetic energy store. When it stops, 11 J has been transferred to the thermal store of the track and 5 J to the thermal store of the car.
There are no other changes to energy stores in the car or track.
How much energy has been transferred to the remaining surroundings?
7 J7\ \mathrm{J}7 J
16 J16\ \mathrm{J}16 J
34 J34\ \mathrm{J}34 J
2 J2\ \mathrm{J}2 J
100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.