ch03-p046 - 46. Where the length unit is not displayed, the...

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cos (3.2)(0.50) (1.6)(4.5) (3.58)(4.53) cos xx yy ab ab ab ab φ =+= += G G which leads to = 57° (the inverse cosine is double-valued as is the inverse tangent, but we know this is the right solution since both vectors are in the same quadrant). (b) Since the angle (measured from + x ) for G a is tan –1 (1.6/3.2) = 26.6°, we know the angle for G c is 26.6° –90° = –63.4° (the other possibility, 26.6° + 90° would lead to a c x < 0). Therefore, c x = c cos (–63.4° )= (5.0)(0.45) = 2.2 m.
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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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