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प्रश्न
Suggest a few methods to reduce friction.
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उत्तर
Methods to reduce friction:
Friction can be reduced
- By using lubricants
- By using Ball bearings
- By polishing
- By streamlining
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संबंधित प्रश्न
State the empirical laws of static and kinetic friction.
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If a body of mass m is moving on a rough horizontal surface of coefficient of kinetic friction µ, the net resultant force exerted by surface on the body is ______.
A block of mass m = 1 kg moving on horizontal surface with speed u = 2 m/s enters a rough horizontal patch ranging from x = 0.10 m to x = 2.00 m. If the retarding force fr on the block in this range is inversely proportional to x over this range i.e.
fr = `"-k"/x` 0.10 < x < 2.00
= 0 for x < 0.10 and x > 2.00
If k = 0.5 J then the speed of this block as it crosses the patch is (use ℓn 20 = 3)
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