Question

For which of the following friction is not responsible?

a) A knot remains in its place.

b) Matchstick catches fire.

c) We can sit on a chair without sliding off.

d) Planet remains in orbit around Sun.​

Answer 1

Answer:

Friction can slow things down and stop stationary things from moving. In a frictionless world, more objects would be sliding about, clothes and shoes would be difficult to keep on and it would be very difficult for people or cars to get moving or change direction

Answer 2

Answer:

d) Planet remains in orbit around Sun.