The navigator of an airplane plans a flight from one airport to another 1000.0 km away, in one direction 30 degrees east of north. The weather office informs him of a prevailing wind from the west of 75.0 km/h. The pilot wants to maintain an air speed of 250 km/h. A) What heading should the navigator give the pilot? B) How long will the flight take? C) How much time ddi the wind save?

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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.