write four methods of reducing friction
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1. greasing.
2. oiling.
3. using lubricants.
4. making objects streamlined.
5. use of ball bearing.
2. oiling.
3. using lubricants.
4. making objects streamlined.
5. use of ball bearing.
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Answer:
Methods for Reducing Friction
☆ Moving parts of machines are covered with oil or grease, which make the effect of friction less.
☆ The surfaces are highly polished, to eliminate the irregularities thus making the surface smooth and reducing friction to a great extent.
☆ Fluid friction is reduced by using streamlined shapes in airplanes or ships.
☆ Use of wheels between surfaces moving over each other reduces friction as rolling friction is less than the sliding friction.
☆ Ball bearings are used in machines to reduce friction. These are tiny steel balls often placed between moving parts of machines which reduces friction and saves a lot of energy.
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