In Example 9, assume that the wind is out of the north at 45 km/h. Express the
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In Example 9, assume that the wind is out of the north at 45 km/h. Express the corresponding wind vector as a sum of vectors, one parallel to the bridge and one perpendicular to it. Also, compute the magnitude of the perpendicular term to determine the speed of the part of the wind blowing directly at the bridge.
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EXAMPLE 9 Let us return to the problem posed at the start of the section (see Figure 13). We have a wind vector w= (60,0) km/h, and the bridge is oriented 32 degrees east of north. Express w as a sum of vectors, one parallel to the bridge and one perpendicular to it. Also, compute the magnitude of the vector perpendicular to the bridge to determine the speed of the part of the wind blowing directly at the bridge. N 32° u 58⁰
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As in Example 9 u cos 58 sin 58 is a unit vector parallel to the bridge The wind vect...View the full answer
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