Question

4. Which of these is a disadvantage of friction ? *
1.enables drawing with a pencil
2.pick up things fallen on the ground wears out brake pads in vehicles
3. enables vehicles to move on he ground
wears out brake pads in vehicles​

Answer 1

Answer:

wears out brake pads in vehicles is a disadvantage of friction

Answer 2

I think it's 9th class question . 3rd is the correct answer