Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

A student is comparing four different electric motors. He records how long each motor needs to raise either a heavy load or a light load by a vertical distance of $1\,\text{m}$. He carries out the same measurement for the remaining three motors. The table presents his results. Which motor has the greatest power?

  • Aheavy load, time taken $12\,\text{s}$
  • Bheavy load, time taken $16\,\text{s}$
  • Clight load, time taken $12\,\text{s}$
  • Dlight load, time taken $16\,\text{s}$

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