On 10 Apr 2021 09:40:11 GMT, Luigi Fortunati wrote:
Let me try a simpler, and clearer, answer.
> In the formula F=ma force is related to acceleration.
I always write this formula as a=F/m in order to stress the fact that if a
force F acts on a body/particle of mass m, then the particle will get an
acceleration a given by a=F/m. This is the Newton's second law.
F is the CAUSE (of the acceleration) and a is the EFFECT. I put the effect
on the left hand side, and the cause on the right hand side,
I DO NOT take the formula F=ma to be DEFINITIONS for F !!!
In a=F/M, F is ANY force, of any nature, coming from various sources, for
- a spring acting on the body or particle: k*x (x is the displacement from
the equilibrium position
- a rope - F = tension in the rope
- a surface with which the body is in contact
- an static electric force (Coulomb) Q1*Q2/d^2
- or gravitational force: m1*m2/d^2
- or friction, etc.
Correspondingly, if on the body/particle acts, for example, only a spring,
then the Newton's second law gives that the acceleration will be
Please note that the Newton's second law is only valid with respect to
certain frames of reference. But about this - maybe later.
IF you believe this was useful for you, please let me know and I will
answer your questions and then I will continue.