Posted by Anonymous on Wednesday, May 5, 2010 at 6:54am.
Vrel = Vtruck - Vcar
That must be treated as a vector equation. Break it up into x (east) and y (north) components.
Vrel,x = 60 -80 sin45 = 3.4 km/h
Vrel,y = 0 - 80 cos 45 = -56.6 km/h
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