State whether friction is useful in each of the following situation and how?
(1) Sharpening a pencil.
(2) gears (in machines) rubbing against each other.
(3) Striking a matchstick to light it.
Answers
Answered by
6
1) useless.... If there's a lot of friction... You won't be able to sharp it.
2) useless... Because more friction in this case = less work done
3) useful = it'll light up! No friction = no lighting of matchstick
Will u b Mai frend? Plj?
Attachments:
Similar questions