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So this problem you have to look at the picture
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on the textbook. Basically his ideas F d r
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is approximately the summation f that del tar and from
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you textbook you should be able to see the Zoff
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picture ofthe F different positions. And if you do
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, you look at their top throat out ish.
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You see that we should have something like this should
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be easy. There are times the projection ofthe fr
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that So we should have something like Oh, for
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plus four plus the four plus four plus one plus
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Sorry, this one's should be plus two plus two
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plus two. So that was a bottom a za
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bottom part of the sea. The Force project on
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the line has the last two and they got ours
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to two times two is four and on the dry
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side, observe off the line The first project to
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the curve a cz the lens one And, uh
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, don't harsh. She'LL still be too. So
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we have plus two plus two plus two. So
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so he has should be taught it to you