Why are m / S ^ 2 and N / kg units of G? Can you prove that they are the same?

Why are m / S ^ 2 and N / kg units of G? Can you prove that they are the same?

Yes, in fact, there are only seven basic physical units in physics. No matter what physical quantity is, it should be classified into the seven basic physical units, which are called Quangang. These quantities include: length (m), time (s), mass (kg), amount of matter (mol), current intensity (a), luminous intensity (CD), temperature (k)

Why can the unit of acceleration a be either M / S ^ 2 or N / kg

Newton's second law
F=ma
F is the force in Newton (n);
M is the mass in kilogram (kg);
The acceleration a = f / M can be obtained from the above formula
So the unit of a is n / kg