Question

2. Study the given situations. State whether friction
(a) is useful or not useful in each of the situation belov
Situations
Useful / not
i) Sharpening a pencil
ii) Gears in machines rubbing
against each others
Ball bearings in roller blades
iv) Striking a match to light it
iii)
(b) Give reasons for your answer in a (iv).
le in daily life.​

Answer 1

Answer:

You can only try one question at the one time, these not allowed multiple questions at the one time .

Explanation:

you are taking more than 1 questions Answers from us and only giving 5 points for multiple questions so what is profit for us ??? you must keep equal things !!!