The three types of friction are:-
A. Static Friction – It is the friction acting on a body when the body is at rest or has not started moving yet and is variable in nature and is always equal to the amount of force exerted by the person on it. It has the maximum value of them all.
For example – A man pushing a heavy block on a rough surface but still the motion of block has not started.
B. Sliding Friction – It is the friction acting on a body when it is in motion and it is constant friction and is always less than the maximum value of static friction.
For example – A man pushing a block when it is moving.
C. Rolling Friction – It is the friction acting on a wheeled body the friction first acts on wheels and then on the body, it is the least amount of friction of them all and also is constant.
For example – A person pushing a trolly at shopping mall.
using trolleys with wheels to move the load, Rolling friction eases the movement
