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Uses of Friction

Uses of Friction. Cemre Çise Kadıoglu. Do we need friction ?. Since friction is a resistance force that slows down or prevents motion, it is necessary in many applications to prevent slipping or sliding.

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Uses of Friction

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  1. Uses of Friction Cemre Çise Kadıoglu

  2. Do weneedfriction? • Since friction is a resistance force that slows down or prevents motion, it is necessary in many applications to prevent slipping or sliding. • In those cases, there is an advantage of having friction. However, too much friction can be a nuisance, because it can hinder motion and cause the need for expending extra energy. • A good compromise is necessary to get just enough friction.

  3. Walking • You could not walk without the friction between your shoes and the ground. As you try to step forward, you push your foot backward. Friction holds your shoe to the ground, allowing you to walk. Consider how difficult it is to walk on slippery ice, where there is little friction.

  4. Writing • 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. • A pencil eraser uses friction to rub off mistakes written in pencil lead. Rubbing the eraser on the lead wears out the eraser due to friction, while the particles worn off gather up the pencil lead from the paper.

  5. Driving Car • Your car would not start moving if it wasn't for the friction of the tires against the street. With no friction, the tires would just spin. Likewise, you could not stop without the friction of the brakes and the tires.

  6. Aircraft and car designers want to reduce drag, so that the vehicle can go fast without having to waste too much fuel. • To reduce drag, we need a shape that the fluid can flow past easily and smoothly, without any swirls.

  7. Friction provides the force to accelerate, stop or change the direction of the car. Ice and water on the road reduce this friction, and make is easier to skid.

  8. We use friction to help us grip. This means that our shoes grip the floor, so we don't fall over.

  9. Resources • http://www.school-for-champions.com/science/friction_uses.htm • http://school.discoveryeducation.com/clipart/images/pencil_color.gif • http://getscrubs.net/UserFiles/Image/cartoon%20car.gif • http://www.ars.usda.gov/is/kids/farm/story4/ToonMan2.gif • http://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Nuvola_apps_important_blue.svg/600px-Nuvola_apps_important_blue.svg.png • http://scidiv.bellevuecollege.edu/Physics/images/Physics4.GIF

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