hello i don\'t get it why EB is (36,-45j,48k). WHy the ycomnponent is negative ?

Question

hello i don't get it why EB is (36,-45j,48k). WHy the ycomnponent is negative ??? i think is BE (-36i, 45j, 48ki) if (0,0,0) is the center of the semicircle the coordenades ofB and E will be the fallow ones.. B (36,0,0) E ( 0,45,48) if this is correct i don't get it why the Ycomponent in thisproblem is nengative... could u help me with thatplease???? thank you very much hello i don't get it why EB is (36,-45j,48k). WHy the ycomnponent is negative ??? i think is BE (-36i, 45j, 48ki) if (0,0,0) is the center of the semicircle the coordenades ofB and E will be the fallow ones.. B (36,0,0) E ( 0,45,48) if this is correct i don't get it why the Ycomponent in thisproblem is nengative... could u help me with thatplease???? thank you very much

Explanation / Answer

B (36, 0, 0) E (0, 45, 48) For this case, the y component should be negative becausevector is from E to point B. For the two cases are: BE is (-36i, 45j, 48k) EB ( 36-0, 0-45, 0-48) Therefore vector EB is (36,-45j, -48k) Does it make sense to you? if you have any question, feel free to send me amessage.

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