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Uploaded byLalitKishore18
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Advantages of friction.pptx

This document discusses the importance and advantages of friction. It provides 9 examples of how friction is important in everyday life, such as allowing us to walk, write, transmit motion between surfaces, and produce heat, sound or energy. Additional advantages covered include how friction allows objects like nails or wheels to be held tightly, enables brakes to stop vehicles, and permits climbing poles and trees. The document also discusses methods to increase friction, such as adding grooves, cuts or coarse powder to improve grip.

Education◦
Middle School Physics ~Lalit Kishore, The Plenum School, HP
Importance of friction  Plays important role in daily life activities  In walking  In writing  In transmitting motion  Producing energy or heat and sound
Advantages of friction 2  When we hammer the nail into wood or wall, it is held tightly due to friction the surface of the the nail and the other material
Advantages of friction 1  Helps in walking We push the ground backward and force of friction works in opposite direction (in forward direction) to make us move without slipping
Advantages of friction 3 Brake shoes when pressed against the moving wheel rim, the wheel stops spinning and the vehicle stops
Advantages of friction 4 We can hold an objects because of the friction between the surfaces of hand and the surface of the object
Advantages of friction 5  We can write on surfaces because of the friction between the writing surface and ink in the pen; between the surface of the white board and the marker
Advantages of friction 6 Due to friction, when surfaces are rubbed together, sound is produced. Rub a wire or sand paper, sound will be produced.
Advantages of friction 7  When a match stick is rubbed on a rough surface, friction produces heat to make the chemical / sulphur in match stick to light up
Advantages of friction 8 We can climb up poles and trees due friction between the surfaces, or else we will slip.
Advantages of friction 9  Motion is transmitted from place place to another through conveyer belts, chains and cogwheels due to friction between them.
Methods of increasing friction  By creating grooves, shallow cuts, depressions on the surfaces, we get better grip. For example the soles of shoes are grooved for creating friction between the surfaces  Tractor wheels are treaded heavily so as not to allow the them slip in wet soil  Gymnasts, weight lifters and wrestlers apply coarse powdery material on hands to get better grip