A hybrid car's regenerative braking system captures kinetic energy and stores it as chemical energy in a battery.
During a braking phase, the system receives 8.5 × 104 J of kinetic energy from the wheels. The useful chemical energy stored in the battery as a result is 3.06 × 104 J.
Calculate the efficiency of the regenerative braking system.
38 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.