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Physics

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  • $\begingroup$ Do you mean applying a force for a limited finite duration or applying a force forever? $\endgroup$
    – Vincent Thacker
    Commented May 2 at 16:38
  • $\begingroup$ In this post I was talking about applying force for a limited finite duration. But I don't think there's a difference between the two; since our object is on a frictionless surface the object should approach infinity regardless of how much force is applied to it over what period of time based on Newton's First Law of Motion. $\endgroup$
    – ryangosling
    Commented May 2 at 16:41
  • 2
    $\begingroup$ 1. There is no speed greater than c. 2. There is no "any amount of force". How do you imagine it? $\endgroup$
    – trula
    Commented May 2 at 16:48
  • 1
    $\begingroup$ Does this answer your question? Can infinite work be done? $\endgroup$
    – Dale
    Commented May 2 at 16:58
  • $\begingroup$ Every object now and then has limited amount of total energy which is bounded by condition : $$\sqrt{\frac {E_{tot} } {\gamma m} } \leq c$$. Your problem is that you include not that distance in work calculation - it must be distance over which force is applied, not total covered distance by body. $\endgroup$
    – Agnius Vasiliauskas
    Commented May 2 at 17:03