﻿ Uses of Friction

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Uses of Friction

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# Walking And Running

Friction makes walking and running possible. If there were no friction, we would be unable to move our legs on the ground without slipping and falling, just like you would experience when you try to move on a slippery surface, such as ice, which offers very little friction underfoot.

Also, friction enables vehicles to move controllably on the road without sliding or skidding, as it would have if it were on a wet slippery road with little friction.

How Friction Enables a Car to Move Forward

As the wheels rotate, the bottom of the wheel pushes backwards on the road; the frictional force acting in opposite direction tries to stop the tire. A reaction is generated at the axle, which pushes the car forward.

Friction Belt Or Belt Drive

Friction is also used in the friction belt or belt drive used in machines, such as a car engine’s fan belt.

The friction between the rubber belt and pulley wheels is used to enable a pulley wheel connected to the engine to drive a pulley wheel connected to the fan.

If a sudden force stops the fan from turning, the belt will slip, and the engine is protected.

# The Grindstone

This is a very rough surface used to wear away metal surfaces to sharpen chisels and knives.

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