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Originally Posted by
Timelord
The efficiency of the generator does not equate in any way to the reduction in acceleration. The problem has a lot to do with how you extract the work.
Watts are a measure of power, not energy. How do you produce the power? You have given very little data about the application. You tell us it is a linear force being used to accelerate a mass and you want to bleed off some of the work being done to drive a generator. Then you tell us that the connection is by chain, which typically used to transmit rotary motion. Generators are typically rotary devices, but could be a linear device. Due to the lack of information, I gave a generic conservation of energy answer that applied only to what you said. If you want more help, explain what you are trying to do. It sounds to me like you need to engage the services of a mechanical engineer as this is very basic physics and mechanics.
Timelord .................................................. ........................................