G3 Friction (On Grade)_02
Did you ever wonder why your shoes have rubber soles? The rubber soles use friction to keep you from slipping. The rubber creates friction with the ground. Cars have rubber tires to grip the road and make it possible for them to move. Without friction, the wheels would just spin freely.
Friction also makes things stop. Look at the brakes of your bike. You will notice how the rubber brake pads rub against the rim when you squeeze the brake lever. When friction is created between the brake pad and the rim, the bike slows down. Friction can help you move and slow down. In this case, friction is good!
Tires and brake pads don’t last forever because the friction wears them out. They must be replaced when they wear out. Friction also occurs inside the car’s engine, and too much friction can wear out these parts as well. Oil is used to reduce the wear by making the parts more slippery. Friction wears out parts and also produces heat.