Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

A car travels along a straight horizontal road. Its kinetic energy is $1.6\,\text{MJ}$. The car then accelerates for $20\,\text{s}$ until its kinetic energy rises to $2.5\,\text{MJ}$. What is the minimum average power developed by the car engine for this acceleration?

  • A$45\,\text{W}$
  • B$205\,\text{W}$
  • C$45\,\text{kW}$
  • D$205\,\text{kW}$

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