Final answer:
Pneumatic systems that operate on low pressure include power brakes and heavy machinery like bulldozers. These systems take advantage of Pascal's Principle to manipulate force through air or fluid-filled pistons in a closed system.
Step-by-step explanation:
Systems that are pneumatic and powered by low pressure often include various types of machinery and equipment that use air to transmit power. For example, power brakes in vehicles use a motorized pump to exert force and make stopping easier. Similarly, heavy machinery such as bulldozers may employ systems with pistons that operate under lower pressure compared to high-pressure hydraulic systems. Hydraulic systems are critical in automotive brakes, hydraulic jacks, and the operation of equipment like backhoes, utilizing Pascal's Principle to multiply the force by transmitting pressure through fluid in a closed system. This is akin to mechanical lever systems but offers the advantage of directing force through curved lines to multiple places simultaneously.