ch04-p129 - 129. We denote v PG as the velocity of the...

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129. We denote G v PG as the velocity of the plane relative to the ground, G v AG as the velocity of the air relative to the ground, and G v PA as the velocity of the plane relative to the air. (a) The vector diagram is shown on the right: G G G vvv PG PA AG =+ . Since the magnitudes v PG and v PA are equal the triangle is isosceles, with two sides of equal length. Consider either of the right triangles formed when the bisector of θ is drawn (the dashed line). It bisects G v , so () AG PG 70.0 mi/h sin / 2 2 2 135 mi/h v v == which leads to
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