76. Velocities are taken to be constant; thus, the velocity of the plane relative to the ground is ˆˆ(55 km)/(1/4 hour) j= (220 km/h)jPGv=G. In addition, ˆˆ(42 km/h)(cos20 i sin20 j) (39 km/h)i (14 km/h)j.AGv=°
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