Question

state in your own words why friction is sometimes friendly and sometimes unfriendly​

Answer 1

Answer:

I think it may help u

Explanation:

friction is sometimes friendly because sometimes it is useful for example when we walk we want friction , so it is friendly.

friction is sometimes unfriendly because for example if friction is more it is very hard to move a vehicle so to decrease it we apply lubricants .

Answer 2

Explanation:

When you play on the ground or when you do stunts with your cycle frictional force is with you because you don't get slipped but when you walk or move a table from one room to another friction is unfriendly because your shoe soles wear away