Final answer:
In a four-pulley system, the typical Velocity Ratio (VR) is 4, assuming it is an ideal system with all pulleys contributing equally and without considering real-world inefficiencies.
Step-by-step explanation:
If a pulley system has four pulleys, the value of the Velocity Ratio (VR) depends on the type of pulley system. To calculate the velocity ratio of a pulley system, the formula Velocity Ratio (VR) = Distance moved by effort/Distance moved by load is generally used. In an ideal system with no friction and weightless pulleys, for a system with multiple pulleys arranged in a block and tackle fashion, the VR is equal to the number of sections of rope that support the load. Therefore, for a pulley system with four pulleys, the velocity ratio would typically be 4, assuming that all pulleys contribute equally to the load's support and ignoring real-world inefficiencies.