There are mainly two types of friction
Static Friction:
It is the force that opposes an object from starting to move when a
force is applied to it.
For example, when you try to push a heavy box
on a flat surface, the force of static friction is what prevents the box
from moving.
Kinetic Friction:
It is the force that opposes an object that is already in motion.
For
example, when you push a shopping cart, the force of kinetic friction is
what makes it difficult to keep the cart moving in a straight line.
Other Frictions
Limiting Friction:
It is the maximum value of static friction that can be achieved before
motion starts.
For example, the limiting friction between a book and a
table is the maximum force that can be applied to the book before it begins
to slide on the table.
Rolling Friction:
It is the friction experienced by an object that is rolling on a
surface.
For example, when you roll a ball on the ground, the force of
rolling friction is what slows down the ball's motion over time.
In
general, the type of friction experienced depends on the nature of the
objects in contact, the force applied, and the relative motion of the
objects.
