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Results tagged with energy
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user 365931
Energy is the conserved quantity associated to time-translation invariance and represents the work a system is capable of doing. Use this tag for questions about energy, and consider adding the [energy-conservation] tag if it is specifically about its conservation.
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Why is kinetic energy a scalar?
I know that the formula for kinetic energy is $\frac{1}{2}$$mv^2$, and such that when we calculate it, we use the speed and not the velocity. … ignore the direction with the velocity (we ignore any $-$ signs), and also, I thought when you multiply a vector and a scalar, $v$ and $m$ respectively, the result is a vector, not a scalar (as kinetic energy …
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Work Done on a rotating body [closed]
Hello so I am having an issue with a question I am trying to solve.
So far I have learnt that the work done by a force $F$ is equal to $F$ multiplied by $x$ where $x$ is the displacement in the direc …
- 195
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Work done by gravity confusion
$m$, its GPE would equal $mgh$, now say we dropped it and it fell a distance of $h$, the work done on the object would be equal to $mgh$, as $W = Fx$, and $F = mg$ and $x = h$, so why is the objects energy …
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