An object of mass 30kg is in free fall in a vacuum where there is no air resistance. determine the acceleration of the object.

That all depends on the planet toward which the mass is falling. 

If this happens to be taking place near the Earth, then the object accelerates
at the rate of about 9.8 meters per second every second.

Furthermore, if there is truly no air resistance, then it makes no difference whether
the object is a feather, a mass of 30 kg, or a school-bus.  All objects accelerate at
the same rate regardless of their mass.

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.