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s0ft
#3
Dec20-12, 09:42 AM
P: 77
I mean in a situation like where you hold an object against, say, gravity for some time would there be any work done? From what we know, until there is no motion, the work done is zero. But would it be possible to look at this problem from the "time" point of view?
For example you have a mass 'm' being attracted to another mass 'M'. You want to keep 'm' from getting to 'M'. So, say you use a rocket to push 'm', against the direction of its motion. If you manage to stop it and hold it against the gravity of 'M', would any work be done? If yes, work against what?