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Physicists say that energy is the ability to do work, and work is moving something against a force, like gravity. But what is energy? Is it something real? I know I will be criticised for using that word. But is it, maybe, something tangible? Or is it only an idea that we created to broadly name a phenomenon we observed? I could not find the answer as to what energy is!

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marked as duplicate by user36790, John Rennie, EnergyNumbers, RedGrittyBrick, CuriousOne Feb 18 '16 at 11:57

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    $\begingroup$ Read this explanation by Feynman $\endgroup$ – biryani Feb 18 '16 at 6:08
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    $\begingroup$ Possible duplicate of What Is Energy? Where did it come from? $\endgroup$ – user36790 Feb 18 '16 at 6:13
  • $\begingroup$ Is pushing a cart uphill a tangible idea? If you don't think so, maybe it's time to get a cart and push it uphill for a while... $\endgroup$ – CuriousOne Feb 18 '16 at 11:57

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