An electric pump is used to raise water from an underground reservoir to a header tank located on the roof of a building. Every minute, the pump raises 15 kg15\text{ kg}15 kg of water through a vertical height of 8 m8\text{ m}8 m.
Calculate the increase in the gravitational potential energy of the 15 kg15\text{ kg}15 kg of water when it is raised 8 m8\text{ m}8 m.
Calculate the useful power output of the pump as it raises the water.
(Take the acceleration due to gravity g=9.8 m/s2g = 9.8\text{ m/s}^2g=9.8 m/s2 or 10 m/s210\text{ m/s}^210 m/s2)
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.