Question

what is friction and pressure

Answer 1

friction is the force between two object when they rubbed together

Answer 2

friction is a type of force which opposes relative motion.

static, rolling and sliding friction aee three types of friction.

unit area is Newton

pressure is the amount of force being exerted on a unit area.

for eg. if 10N of force acts on 1cm^2 of area, then the pressure is 10/1 which equals 10 N

unit area is pascales