write some methods used to reduse friction.
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Following are some ways to reduce friction :
1. By polishing - When the surfaces are highly polished, the irregularities (in the form of hills and valleys) of the surfaces are covered, making them smoother full stop consequently, friction is greatly reduced.
2. By streamlining - The bodies of cars, aeroplanes, etc., are streamlined to reduce air friction. Similarly, the bodies of boats and ships are streamlined to reduce the friction of water.
3. By using ball bearings - Ball bearing is a hollow, circular device containing small metal balls which are fitted around the moving parts of a machine (like an axle). The ball bearing reduces the friction by converting sliding friction into rolling friction.
1. By polishing - When the surfaces are highly polished, the irregularities (in the form of hills and valleys) of the surfaces are covered, making them smoother full stop consequently, friction is greatly reduced.
2. By streamlining - The bodies of cars, aeroplanes, etc., are streamlined to reduce air friction. Similarly, the bodies of boats and ships are streamlined to reduce the friction of water.
3. By using ball bearings - Ball bearing is a hollow, circular device containing small metal balls which are fitted around the moving parts of a machine (like an axle). The ball bearing reduces the friction by converting sliding friction into rolling friction.
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