An airplane has an air speed of 520 mph with a heading of 215°. Find the plane's ground speed and course if it encounters the following winds: ROUND TO THE NEAREST TENTH IF NEEDED. A headwind of 32 mph. Ground speed: mph Course: A tailwind of 32 mph. Ground speed: mph Course:

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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.