Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

A car weighing $15\,000\,\text{N}$ is travelling on a horizontal road. At a particular moment, the thrust force from the engine on the car is $12\,000\,\text{N}$ and the resistive force on the car is $3000\,\text{N}$. The car's velocity at this instant is $24\,\text{m s}^{-1}$. Calculate the power output from the engine.

  • A$72\,\text{kW}$
  • B$220\,\text{kW}$
  • C$290\,\text{kW}$
  • D$360\,\text{kW}$

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