An electric train is travelling along a straight horizontal track. The train has 12.0 MJ12.0\text{ MJ}12.0 MJ of kinetic energy. The train accelerates for 40 s until its kinetic energy increases to 18.0 MJ18.0\text{ MJ}18.0 MJ.
What is the minimum average power developed by the train's engines for this acceleration?
150 W150\text{ W}150 W
750 W750\text{ W}750 W
150 kW150\text{ kW}150 kW
750 kW750\text{ kW}750 kW
95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.