Final answer:
Hydraulic systems work on Pascal's Principle, transmitting pressure and multiplying force through a fluid. 'PSI precharge' is a term used to denote the preset pressure within these systems. Understanding how these systems function is crucial for calculating forces and pressures involved in lifting heavy loads.
Step-by-step explanation:
The subject matter in question pertains to the concept of hydraulic systems and their functioning based on Pascal's Principle. Hydraulic systems utilize a fluid to transmit pressure from one point to another, often multiplying force as part of mechanical systems such as lifts or backhoes. The 'PSI precharge' mentioned refers to the preset pressure within the hydraulic system before it begins operation, with PSI standing for pounds per square inch, a common unit of pressure.
In more technical terms, to support a 2000-kg car using a hydraulic lift that has a pedal cylinder diameter of 2.00 cm and a wheel cylinder diameter of 24.0 cm, one would use Pascal's Principle to calculate the force necessary. For example, if a backhoe's hydraulic system must support a combined weight of 550 kg (400 kg for the load and 150 kg for the brace and shovel), and the secondary cylinder has a diameter of 2.50 cm, you would calculate the force required and relate it to the pressure needed in the hydraulic fluid, as well as determining the force the operator needs to apply on a lever to achieve this pressure.