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Un article trouvé pour ce sujet.
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Cycling in the wind |
2004-10-11 |
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A student pose la question :
A cyclist is travelling in the direction of 12i+5j at a speed of 39 km/h where i is a unit vector due east and j is a unit vector due north. The wind appears to the cyclist to be blowing with a velocity of (-4i+j) km/h. Find, correct to 1 d.p
(a) the true speed of the wind and
(b) the bearing from which the wind is blowing
Penny Nom lui répond. |
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