An electric model train climbs up a steep hill track. The train obtains energy from an onboard rechargeable battery.
Complete the sequence of useful energy transfers as the train climbs up the track:
................................→electrical energy→................................ \text{................................} \rightarrow \text{electrical energy} \rightarrow \text{................................} ................................→electrical energy→................................The train can be controlled to speed up, slow down, or stop. Describe the motion and position of the train when it has a large quantity of gravitational potential energy and zero kinetic energy.
As the train climbs, some energy is wasted. State a form of wasted energy and describe what happens to this energy.
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.