Question

what kinds of friction do you know and explain with suitable example s?

Answer 1

three kind of frictions are there
sliding box moved with help of any external force
rolling. box moved with the help of wheels
static box doesnt move until external force is applied

Answer 2

friction is of four kinds they are:
static friction: friction which comes into play when surfaces of the objects are at rest relative to each other
example: 1) we are applying force on a big rocks but unable to more the rock due to its static friction
sliding friction: the friction which comes into play when the surface of one object moves related to surface of another object
example: when the applied force is more than limit of static friction, then the object starts to move it is example of sliding friction
rolling friction: when one body rolls over the surface of another body, the friction offered is called rolling friction
example: it is easy to pull a suitcase with as rollers
fluid friction: friction exerted by Fluids like liquids and gases is called fluid friction
example: the shape of words are such that they overcome the fluid friction