A hydraulic cylinder can indeed be used as a replacement for a motor in a building hoist, but it requires a different system design. Hydraulic systems use fluid pressure to generate linear motion, which can be harnessed to lift and lower loads. They offer high power-to-weight ratios and can handle heavy loads, making them suitable for hoisting applications. However, they require a power source for the hydraulic pump, and the system must be designed to manage fluid flow, pressure, and safety features. Unlike electric motors, hydraulic systems also need regular maintenance and can be less energy-efficient. Despite these differences, with proper design and engineering, a hydraulic cylinder can effectively replace an electric motor in a hoist system.