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FisherDude
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Homework Statement
Work is done on an object far out in space where it has negligible gravitational-PE. If in the process there is no net change in KE, we can conclude a) friction may have been operative b) this situation is impossible c) the energy of the object has decreased d) the object's speed decreased e) none of these.
Homework Equations
The Attempt at a Solution
I'm guessing it's a), since for an ordinary object on Earth it's possible to do work on it and not change its kinetic energy: if there is kinetic friction working against it, for example. but it says it may have been operative, so does that imply some other force could be acting against the object in space and yet not do any work on it?
Thanks