Physics 9702 · AS & A Level · Gravitational potential energy and kinetic energy

Gravitational potential energy and kinetic energy — practice question

An upward force of $1000\,\text{N}$ is required to raise the hook of a crane at constant velocity. The crane is then employed to lift a load with mass $1000\,\text{kg}$ at a constant velocity of $0.50\,\text{m s}^{-1}$. What power is required to lift the hook and the load?

  • A$4.9\,\text{kW}$
  • B$5.4\,\text{kW}$
  • C$20\,\text{kW}$
  • D$22\,\text{kW}$

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