5. Explain how George Westinghouse's invention changed the braking system of trains.

George Westinghouse's invention of the air brake system revolutionized the braking system of trains. Prior to his invention, trains relied on manual braking systems, which were slow and inefficient. Westinghouse's air brake system used compressed air to transmit force to the brake pads, allowing for faster and more reliable braking. This invention significantly improved the safety and efficiency of trains, making them a more viable mode of transportation.