WEBVTT
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again. The work we're going to calculate equals two
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parts the work done by the cable, plus the
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work, then on coal. So for the cable
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part W one equals two 0 to 400 two x
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dx. The thing is, we're gonna think of
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a little segment. The thin slice of the cable
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and the work done on the simple segment equals to
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two x times Delta X, and we transform this
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ribbon son to over Riemann Integral have this results and
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for double too, because all the call is concentrated
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at the end of the rope. So it's simply
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the weight to coal some of the work. This
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is all the calls going to travel. Imagine the
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picture, please. That's the cable and physical.
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So, um, the work, the work that's
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done on the coal equals two the weight. 800
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times. Distance 100. So we're W W 1
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22 which is going to be 6.5 times 10 to
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the five. The total work