8. To reach a final destination a pilot is plotting a course that will result in a velocity of 450 mph in a direction N60°W. There is a wind blowing at 50 mph from due south. Find the direction and the speed of the plane. * a. 312 mph N45.32°E b. 356 mph N54.79°E c. 434 mph N45.32°E d. 477 mph N45.32°E e. None of the above

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Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.