Question

what is static friction​

Answer 1

Explanation:

friction ,in ccontrast acts between surface at rest with respect to each other .

Answer 2

Static friction is a force that keeps an object at rest. Static friction definition can be written as:

The friction experienced when individuals try to move a stationary object on a surface, without actually triggering any relative motion between the body and the surface which it is on.
It can be explained as the force of friction which precisely balances the applied force for the duration of the stationary state of the body.

The static frictional force is a self-regulating force, i.e. static friction will at all times be equivalent and opposite to the force applied.Static FrictionR is the reaction force because of the weight W. the external force is F and fr is the friction. F = -fr when no motion takes place.

Static Friction Examples
Some real-life examples of static friction are given in the points below.

Papers on a tabletop
A towel hanging on a rack
A bookmark in a book
A car parked on a hill