Question

Read and study the given actions carefully and answer correctly. " Where the friction is useful?" I.Striking a match stick, II.Writing with a pencil, III.Pushing a cupboard from one room to another, IV.Sharpening a knife​

Answer 1

Answer:

1, 2 and 4 it will be useful

as it helps us to do those things in the first place

however it just increases the burden on the person to push the cupboard

please mark as brainliest if found helpful

Answer 2

Answer:

answer as follows in the picture

Explanation:

please mark me as brainliest