- #1
Entanglement
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I've learned that a force is said to do work when it acts on a body and causes a displacement in the same direction of the force and that W = F.s ( when theta equals zero)
But I have a problem understanding the concept. On Pushing a brick wall, carrying a bag heavy brick at a constant height, it is said that zero work is done, according to W = F.s Cos theta, these previous examples can be explained, but equations are not everything about physics, I have a hard time to believe that one can spend hours pushing a wall, he sweats, his face becomes red and he eventually falls unconscious, but after all of that it is said that the work done is Zero because s = zero.
I'm not saying W = F.s isn't correct, I'm just saying that there's is something I'm missing causing this misunderstanding, So I would like some clarification, thanks in advance.
But I have a problem understanding the concept. On Pushing a brick wall, carrying a bag heavy brick at a constant height, it is said that zero work is done, according to W = F.s Cos theta, these previous examples can be explained, but equations are not everything about physics, I have a hard time to believe that one can spend hours pushing a wall, he sweats, his face becomes red and he eventually falls unconscious, but after all of that it is said that the work done is Zero because s = zero.
I'm not saying W = F.s isn't correct, I'm just saying that there's is something I'm missing causing this misunderstanding, So I would like some clarification, thanks in advance.
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