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# Conservative Forces and Potential Energy


$$\vec{F} = -\frac{\partial U}{\partial x}\hat{i} - \frac{\partial U}{\partial y}\hat{j} - \frac{\partial U}{\partial z}\hat{k}$$

Firstly why isn't it this instead


I'm quite new with partial derivates so a brief explanation of them would be helpful

Note by Saad Haider
3 years, 6 months ago

## Comments

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Not sure about this, understand that the U here as 3 components, and so therefore it is impossible to use the d in the second equation because there are 3 dependent variables. As far as i know of, normal differentiation doesn't work when you have more than 1 dependent variable. · 3 years, 6 months ago

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