Re: The "net" force

Mikko il 24/03/2025 10:14:22 ha scritto:

On 2025-03-22 16:31:37 +0000, Luigi Fortunati said:
=20

In the animation https://www.geogebra.org/classic/sr8fxezb there is =

the

force F of the hand that pushes the point A of the car.
=3D20
The force F that pushes the car is certainly a "net" force because
there is no one to push the car from the other side.
=3D20
But is the force F that pushes the point A of the car also a "net"
force?

=20
A net force to the car is not a net force to a part of the car.

=20
I agree: the force F of the hand is a net force on the car but it is=20
not a net force on point A.
=20
Consequentially, on point A there must be *also* a force acting=20
contrary to the force F.
=20
So, does the blue reaction contrary force FR of my animation act only=20
on the hand that pushes (as you all keep saying) or does it act *also*=

=20

on point A of the car?

>
The interactions are between material parts. A point does not interact.

I am referring to the material point, that is, the particle.