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| 1. |
Friction is necessary evil |
| Answer» Friction is known as a nesssary evil becauseit helps as--we would not be able to walk without friction--without friction we would slip--the brakes of the vehicles also work by frictionit causes problems as--it wears out thematerials wheter they are screws, ball bearings ors soles of shoes--because of wearing out of these materials we have to buy things again and again | |