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View Full Version : Finding The Resultant Vector


joneassam
Jan 29, 2012, 11:57 PM
A plane is flying southeast at 215 km/h. Suddenly there is a wind from the north at 75 km/h. What is the plane's new velocity with respect to the ground in standard position?

Aurora2000
Jan 30, 2012, 02:04 AM
Impose a coordinate system where positive x axis direction is east, positive y axis is north, negative x axis is west and negative y axis is south: plane's velocity is directed southeast (i.e. along the bisector of the IV quadrant), while wind blows from north to south: you have that the angle between these 2 velocity vectors is 45 degrees, so sum these vectors.