Recent content by carm8

clearly you had a go at responding to the question so i doubt you know the answer

efficiency would be in the context of work output to energy input. i asked my lecturer about it today and he told me that there is a mass fuel rate of glucose a lower heating value and the work efficiency is a function of velocity.

what i said must have sounded stupid, what i meant was that because the system seems to be static no time derivatives moving parts etc it appears as time would not be a parameter even though we know that it is because you need to supply energy continuously. this might be a little philosophical...

ok, but let's just say we change the system. an electric drill drilling into something that is too high in friction. the batteries get drained the coils heat up and no work is being done. could this scenario be quantitatively measured using electrical theory.

this was the response i was looking for. Just want some confirmation on this... so the complete energy transfer is from chemical/metabolic to heat. being zero efficient would just mean that no work is being done. also i think a good response to this question would be to answer the following...

i have asked many lecturers and students this question and have never received a logical sounding answer. Why is it that if you hold a weight in a position (lets just say at the midpoint of a bicep curl) that you are using energy yet there is no net work being done as there is no distance that...