1.) When you fall down and slide along a downward sloping asphalt road, face down, friction is harmful. 2.) Writing with your Parker fountain pen on a poorly finished wall.

A world without friction would be unlivable. The reason why friction is so important to our world, is because it affects everything that’s in motion. When any object is moving, slipping or sliding in one direction, friction is acting in the opposite direction. So, for example, consider something as simple as walking.

Without friction, energy transfer would be easier and stopping motion would be more difficult. If there was no friction, there would be no force slowing down motion when two objects rubbed against one another.

friction. Snow increases the friction between your shoes and the ground. IIIIIIIIIIIIIIIIIIIIIIIIII Friction is useful in playgrounds.

Without the force of friction, the car would tend to go in a straight line — straight off the road!) When a car slows down, the friction between the road and the tires helps to bring the car to a stop as the wheels slow down. It is the friction between the wheels and the brake pads that causes the wheels to slow down.

Writing with a pencil requires friction. You could not hold a pencil in your hand without friction. It would slip out when you tried to hold it to write. The graphite pencil led would not make a mark on the paper without friction.

If there were no friction then once a vehicle started moving, it would never stop. We are able to write and make drawings on paper because there is friction between the tip of pencil or pen and paper. This friction is not sufficient to rub off black graphite particles from the tip of pencil.

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.