ch03-p053 - 53. Noting that the given 130 is measured...

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(b) Since the y axis is in the xy plane, and AB × G G is perpendicular to that plane, then the answer is 90.0 ° . (c) The vector can be simplified as ˆˆ ˆ ˆ ˆ ˆ ( 3.00k) ( 5.14i 6.13 j) ( 7.72i 9.20 j 3.00k) ˆˆˆ 18.39i 15.42 j 94.61k ×+ = + × + =++ G G Its magnitude is ˆ | ( 3.00k) |= 97.6. G G The angle between the negative direction of the y axis ( ˆ j ) and the direction of the above vector is 1 15.42 cos 99.1 . 97.6 θ §· == ° ¨¸ ©¹ 53. Noting that the given 130 ° is measured counterclockwise from the + x axis, the two vectors can be written as ˆ ˆ 8.00(cos130 i sin130 j) 5.14i 6.13 j
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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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