00:01
According to the first part of the question, it is asking us whether static friction, static friction applied between two surfaces, between two surfaces depends on the size of the surface, size of surface.
00:24
So to answer this question, let's know what static friction is first.
00:28
We'll denote f as friction and static friction as fs.
00:35
Normal force as f and limiting friction that is the maximum static friction as f s max so f a frictional force that resists this force f resists f is called frictional force or a static friction when we call it static friction we denoted by f s so this force when applied on an object keeps the object at rest unless an until unless an until a force larger than fs a force larger than f s let's say f dash is applied on the object when this force f dash is applied then the object moves it takes the motion now even the maximum static friction that is f max fs max does not depend on on does not depend on size and area of the object or the surface area of the surface.
01:57
It only depends on the nature and roughness of the surface.
02:09
This was the answer to our first part.
02:12
Now let's move on to the second part of the question.
02:14
It is asking us to suggest improvements while measuring the static friction between the surface of two papers.
02:23
So we can give the points as first point.
02:28
The two sheets of paper, the two sheets of paper should be equileveled.
02:36
Let's write it like this, clearly equileveled.
02:45
Okay.
02:46
Now, the second improvement can be.
02:51
The second improvement can be in the experiment, in experiment to measure the static frictional value between the two surfaces of paper, it should be generally applied without without applying load or a jerk.
03:16
Load or jerk.
03:20
We know what jerk is.
03:22
Rate of change of acceleration so there should be no jerk so these are two points now the third point can be the experiment can be slowly carried out by slowly increasing slowly increasing let's say increasing like this slowly increasing the angle between the sheets together between sheets together and the ground then the angle, let's say theta is the angle...