On a calm day, a large decorative fountain propels 45 000 kg45\,000 \text{ kg}45000 kg of water per minute to a vertical height of 160 m160 \text{ m}160 m. Take the acceleration due to gravity, ggg, to be 10 m/s210 \text{ m/s}^210 m/s2.
Calculate the power used in raising the water.
The electrical pump operating the fountain has an efficiency of 75%75\%75%. Calculate the electrical power supplied to the pump.
On another day, a strong horizontal wind is blowing, causing the water jet to bend. Explain why the water still rises to a maximum height of 160 m160 \text{ m}160 m.
95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.