Automobiles and Motorcycles


Automobiles are complex systems with many moving parts and multiple functions. They’re a common form of family transportation. Around 1.4 billion cars are in use worldwide, with one-quarter in the United States. The average American drives three trillion miles per year, so the vehicles have become an essential part of daily life. The automobiles contain a wide variety of materials, including plastic body parts, headlights, and bumpers. The majority of these materials can be recycled. In addition, modern automobiles have advanced technology that allows drivers to issue commands verbally and with facial recognition.

Automobiles, including motorcycles, are often four to six-speed vehicles, although small motorcycles can have two-speed transmissions. They operate by transmitting power through a belt or chain. Drivers control the throttle and clutch using handgrips. Brakes on the front wheel are operated by levers located near the handgrip, while the rear wheel may be operated by a foot pedal. Many motorcycles use a kick start, but many modern models have an electric push-button starter.

Automobiles have been in use for thousands of years and are an essential part of modern society. Automobiles are powered by an internal combustion engine or electric motor and can carry many passengers. Automobiles are crucial to modern society, serving as a lifeline for humans and their goods.

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