Question

friction called a necessary evil. why?​

Answer 1

Answer:

Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. ... Hence it is considered as a necessary evil ......

Answer 2

Answer:

• frictional force causes a lot of losses in general upkeep and wear and Tear of machinery hence it is considered as a level but almost all clerical touch cannot be carried out without the presence of friction