An upward force of $1000\,\text{N}$ is required to raise the crane hook at constant speed. The crane is then employed to lift a load of mass $1000\,\text{kg}$ with a speed of $0.50\,\text{m s}^{-1}$. What proportion of the power produced by the crane’s motor is spent in raising the hook and the load? Take the acceleration of free fall $g$ as $10\,\text{m s}^{-2}$.
- A$5.0\,\text{kW}$
- B$5.5\,\text{kW}$
- C$20\,\text{kW}$
- D$22\,\text{kW}$