My pushing is completely balanced by the force of friction.

(There is also the force of friction.)

So this is the force that really overcome friction and this over here will be equal to the force of friction

Maybe if my force of pushing were larger than the force of friction, or the force of friction were larger than my force of pushing.

There is not just the force of me pushing. There is also the force of friction.

And as you can imagine, this is the force of friction

This right over here is the force of friction

The force of friction here completely offsetting the force of gravity parallel to the surface is 49 N

So what is the force of friction in this case?

If my force of pushing is less than the force of friction, then the TV set will to decelerate.

So it's actually the force of friction in this example

And so you have, in this situation, the force of friction is going to be

So the force of fiction must be 49.5 N

And in either situation the force of friction is going against your motion

If my force of pushing is larger than the force of friction, then my TV set will start to decelerate.

I'll do friction in orange 2 N to the left

You can view it as the force of friction of the air, and let's say that is 1 N up.

So i'll call that, there is also the force of friction. And if I want to keep this

So that's essentially the force of friction that you are overcoming

The thing that's keeping it going in the circle is actually the force of friction

And so now the force of friction went down a little bit to 26.95 N

And the force of friction, assuming we're moving the magnitude of the force of friction will always go against our movement is going to be remember, our normal force is 49 N

This is the force of friction or you can call it air resistance.

3 N is the guy on the right plus the force of friction.

And not only the force of friction, you also have some air resistance

The force that is keeping this block from sliding down in this situation is the force of friction and the force of friction will always act in a direction opposite to the motion if there was not any friction or the potential acceleration if there was not any action

So we don't know how much force it took to overcome static friction

In fact, this friction is more important than the power of the man or the power of the machine in determining overall capability.

But if it still was not moving then the force of friction was still completely overcoming it

I guess the force just to overcome the force of friction, just kind of get right over that the most friction that can be applied by kind of the abrasiveness of the 2 things when the object is stationary

So even if you push it in that way sounds like force of friction is all of a sudden going to help you

If 10 newtons of force are applied, with a frictional force of 4 newtons, what is the highest speed this object can reach?

26.95 N which is the force of friction to the left always acting against us means that there's a net force to the right of 73.05

Combined, we're providing 50 N to just start budging it to just overcome the force of friction

The magnitude of the force of friction over the force of contact the contact force between those two, so over the normal force and it makes sense that the larger the contact force the more that these are being pressed together the little at the atomic level, they kind of really get into each others grooves the more budging force you would need or the more friction force would go against your motion

Friction

And just by going back to this example, the only reason why it will slow down, if I were to stop pushing, is becuase there is a net force on it, the force of friction.

So in that static scenario, the force of friction changed as I applied more or less force in this downward direction

But we do know that there is some force of friction that is keeping this box from accelerating keeping it at a constant velocity that is completely negating the parallel component of the force of gravity parallel to the surface of this plane

This guy's pushing harder with 3 N, but the force of friction is now 2 N to the left.

And the difference between this video and the last video is last time friction was static even at 49 N, the box was stationary

So let's think about what the necessary force will we need to overcome the force of friction right here in the static situation

We always have enough force to start budging it but right when we budged it we overcome the static friction for just a moment our acceleration was slower because we're overcoming that static friction but once we budged it and once it's moving and assuming that we're continuing to apply a constant force over here then all of a sudden, the force of friction since we're kind of bump it along the top now and not stuck in their grooves we're now using the coefficient of kinetic friction

All the way until I hit 50 N and the block started to budge which tells us that the force of friction, or at least the force of static friction all of a sudden now couldn't keep up and it started to accelerate downwards

So the coefficient of friction tells us