Newton's second law of motion online calculator

The acceleration of an object is proportional to the force exerted
on it and inversely proportional to
the mass of the object. The direction of acceleration is the same as
that of the external force. From
the point of view of physics, the second law of Newton's motion can
also be expressed as "the rate of
change of momentum of an object with time is proportional to the sum
of external forces", that is, the first
derivative of momentum to time is equal to the sum of external forces.

Newton's second law shows that under macroscopic low speed, the proportional
expression is: a∝F/m, F∝ma;
F = kma can be written by mathematical expression, where k is the
proportional coefficient and is a constant.
But because there was no stipulation on how much force was the unit
of force at that time, the selection of the
proportional coefficient K would be arbitrary. If k = 1, there would
be F = ma. This is the mathematical expression
of Newton's second law, which we are familiar with today.