Homework Answers
1] speed of plane wrt ground = 160 cos 30 degree (West) + 160 sin 30 degree - 42 (South)
= 138.56 West + 38 South
= sqrt(138.56^2+38^2)
= 143.7 m/s
2] angle = 180 degree + arctan(38/138.56) degree
= 195.34 degree
3] distance in west = 138.56 m/s *3600 = 498816 m
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