ch03-p059 - 59. The vectors can be written as a = a and b =...

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(h) Also, | | ab ba a b ×=×= GG . (i) With d > 0, we find that ( / ) d × G G has magnitude ab / d . (j) The vector ( / ) d × G G points in the + z direction. 59. The vectors can be written as ˆˆ i and j aa bb == G G where , 0. > (a) We are asked to consider G b d b d = F H G I K J # j in the case d > 0. Since the coefficient of # j is positive, then the vector points in the + y direction. (b) If, however, d < 0, then the coefficient is negative and the vector points in the – y direction. (c) Since cos 90° = 0, then 0 ⋅= G G , using Eq. 3-20.
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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