I cant remember but I hope this answers, you have to use brakes in a car to stop the car therefore friction is increased (or it stops).
Lubrication is the use of oil and grease to increase friction in a vehicle's moving parts
friction
Friction between the parts of an engine is reduced by applying oil between its parts. mobiloil is particularly used for this purpose.
to reduce friction between the parts of a car
the brakes use friction to stop the car
How - with cooling oil Why - because friction causes heat, and overheating is bad for moving parts.
friction
friction
Two kinds of friction affecting mousetrap cars are rolling friction, which occurs when the wheels of the car roll on a surface, and sliding friction, which occurs when the moving parts of the car rub against each other or the surface. Both types of friction can affect the speed and efficiency of the mousetrap car.
Friction in a car engine is reduced by using proper lubrication, such as engine oil, to create a smooth surface between moving parts. Additionally, improving the design and materials of engine components can help minimize friction. Regular maintenance and keeping the engine's parts clean can also help reduce friction.
You can minimize friction in your car (notably in the engine) by always using the lubricating oil and oil level that is recommended by the car manufacturer. Keeping grease points in good condition also helps to reduce friction and wear and tear on moving parts.