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Well i know that it needs infinite energy..but the term infinite is itself not physical so i am not satisfied with this answer ...but what would happen if we provide a constant acceleration to an object for hundreds of year ...isn't its velocity will go on increasing with time ?? some told me as velocity increases ...so time dilation occurs and time slows down ...so acceleration will not work ...but i didn't get it ..its all messed up ...please help ..
Can i get an answer only in term of forces and time i mean without using infinite energy concept ...i hope you will get what i wanna ask about