Car

A car is a motor vehicle designed primarily to carry people on roads. It typically has four wheels and is powered by an internal-combustion engine or an electric motor.

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Internal combustion engine: An engine that produces power by burning fuel inside a combustion chamber. It converts gasoline or diesel into the motion that drives many cars.
Chassis: The structural frame or supporting assembly of a vehicle, including its principal mechanical components. It supports the body, suspension, powertrain, and other major car systems.
Benz Patent-Motorwagen: A three-wheeled motor vehicle built by Carl Benz and patented in 1886. It is a landmark early car powered by an internal-combustion engine.
Electric car: A car propelled by one or more electric motors, usually drawing energy from rechargeable batteries. It replaces onboard fuel combustion with electricity stored in batteries.
Traffic congestion: A condition in which road traffic moves slowly or stops because demand exceeds available capacity. Large numbers of cars can overwhelm road capacity and delay travel.
Electric motor: A machine that converts electrical energy into mechanical motion. It provides propulsion in battery-electric cars and hybrid vehicles.
Automotive suspension: A vehicle system that connects its wheels to the body and manages movement over uneven surfaces. It helps the car maintain tire contact and cushions occupants from road impacts.
Ford Model T: A car produced by Ford from 1908 to 1927 that helped popularize automobile ownership. Its production illustrates how cars became more accessible through industrial scale.
Hybrid electric vehicle: A vehicle that combines an internal-combustion engine with an electric motor for propulsion. It combines two power sources to move a car and manage energy use.
Road traffic safety: The study and practice of preventing deaths and injuries in road transport. Car crashes make vehicle design, road design, and driving behavior matters of public safety.