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A man and a woman start at the same location. The man walks North for 30 minutes and travels a distance of 2.2 km, he then walks West for 20 minutes and travels a distance of 1.8 km. The woman walks West for 15 minutes and travels a distance of 0.6 km, she then turns North and walks 0.4 km in 15 minutes.
1) What is the man's average speed?
2) What is the woman's average velocity?
3) What is the displacement from the man's final location to the woman's final location?
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Over a time interval of 2.16 years, the velocity of a planet orbiting a distant star reverses direction, Find the total change in the planet's velocity in m/s
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