Force to turn a generator
A total newbie here , please bear my ignorance.
If I had a moving body and i wanted to generate electricity from this movement , I figured out how to connect it to a generator so when i moves the generator's shaft turns . Now i need to know if the speed of the body will be the same if i didn't connect it to the generator , for example , the force on the body is 5000 N and it's mass is 50 Kg , it will have an acceleration of 100m/s^2 , will this acceleration be the same if it was connected to the generator ( about how it's connected , the body has gear teeth integrated to a drive chain ( like the one in the bicycle) turning gears and turning the generator) , also what will be the efficiency of this generator , will it be like the water turbine ( over 90%)?. Thanks